Wow. It's such a personal decision. And SO many things to consider...But here are some factors that come immediately to (my) mind:
1. Your travel times are not the "most difficult" (depending on whether you want to include a holiday weekend, or do Food & Wine)...if you want to do F&W and be within walking distance of Epcot, then your 11-month home resort advantage at either BCV or BWV will be an important factor. If your travel has to include holiday times (e.g., Presidents Day weekend, Martin Luther King weekend, Marathon weekend) then while you may well find the size accommodations you want at one of the
DVC resorts at 7 months out, you may find your 11-month home resort advantage an important factor...if, however, you are flexible about when in Sept/Oct or Jan/Feb you want to go, the 11-month home resort advantage is not as critical a factor.
2.
www.disneyworld.com (then click on resorts) will get you to pictures & descriptions of the six DVC resorts at WDW (AKV, BCV, BWV, OKW, SSR and WLV)...that will help you factor in "looks"
3. OKW villas are bigger, and the studios have two beds rather than a bed and a pull-out couch, if that matters to you...
4. OKW and SSR are "dedicated DVC" (CRO does rent villas there to non-DVC guests, but Disney-controlled inventory (as compared to DVC inventory) is limited)...BW, BC, WL and AK all have "regular hotels" attached to them...don't know if that might make a difference to you, but it's worth considering...
5. OKW are more "neighborhood-y" while the others are more "compressed/hotel-like."
6. From SSR you can walk (easily and pleasantly) to DTD (where you can easily catch a bus to another resort). There are lots of dining, shopping and night life options at DTD...From BCV and BWV you can walk to Epcot (and for those who like to walk, to MGM (it's about 3/4 mile to MGM from the front of BWV)...and there's also a huge choice in nightlife and restaurant options at these two resorts...WLV is a short boat-ride to MK, and is close to Wilderness Lodge and its Hoop-de-Doo review, campfire and other activities...some think AK feels a bit isolated...I've not seen anyone say that about OKW (maybe because it's a bit less than a mile of pleasant walk over to SSR and/or DTD? Or that it's connected to DTD and SSR by boat?)...AKV/AKL is about a mile from AK Park--but I don't think there's a way to walk over--and it's not "proximate" to anywhere else at Disney (relatively speaking)...so if you find Disney buses to be an issue, and/or don't want to drive yourselves, you might prefer a resort that has alternative transportation (other than your own car)...but AK does have the animals--many people really love to view the animals on the savannahs...note: BCV & BWV do not have buses going to the front of Epcot...you can walk thru the International Gateway, or take a boat to that "back door" but there's no "from-the-resort" bus service to the front of Epcot (where the monorail is)...
7. Finances: Leaving aside resale, if you are going to buy from Disney, probably your best "deals" can be had by buying SSR or AKV...Disney usually has some sort of incentive (discount or extra points upon purchase) going for those two resorts. They do sell the "sold-out" resorts (points Disney got back from ROFR or foreclosures), but they're top-dollar and I've never seen them availalble w/incentives...Dues are least expensive at SSR...but the variation in dues isn't all that huge (I think the biggest spread is about $1/point...SSR's dues currently are $4.12/point)...
8. Time. SSR and AKV ownership lasts longer (I'm forgetting the numbers now...I think it's 12 years longer for SSR...at your ages, that might matter to you...Disney is now offering OKW owners an extension so their ownerships can go longer, too, and speculation is that this may happen at the other "short-life" resorts (for which ownership still lasts 30+ years!)...for us that simply wasn't a factor at all, so I don't pay too much attention to that detail...
So...those thoughts may get you started...good luck w/your decision...you'll find lots to love about all the DVC resorts (check out the individual resort "lovers and owners" threads!), and given your "prime travel times," it's highly likely you'll be able to choose to stay at all of them at one time or another...so the 11-month home resort advantage may not make that much of a difference to you. If you think you'll be happy "sleeping around" as one of our posters puts it (i.e., it won't matter all that much to you which resort you stay at for any particular trip), then you can choose based on price, or the "emotional feel" one or another of the resorts holds for you.
We wound up buying the great majority of our points at SSR (we own a few at BCV, too)...we loved it and still do...but we also don't really care all that much which resort we stay at...sometimes we prefer one over another, and we do have our favorites, but there's not one we wouldn't be thrilled to stay at for any trip...so for us, it came down to price/cost...
Good luck!