If you look at the number "cost" overall, VB is the most expensive DVC to own. The upfront cost is quite a bit less, but when you throw in the annual dues it will cost thousands more over the life of the contract.
Now SSR, OKW, and HHI are the "cheapest" of the DVC's to own at this point. In my opinion, SSR is the "best deal" with the current incentive, but only because you can get the 12 extra years. After that, then it would be HHI and then OKW based on overall cost.
Here's a "simple" calculation comparison of the resort costs. These figures are based on 150 point contracts at cost per point based on contracts that have recently passed ROFR (or using the SSR promo price). I used a closing cost of $400. I am also using the current MN fee figures to calculate the cost over time (of course this isn't accurate because the MN fees will go up each year but you can get an idea of how the MN fees can impact the price).
These will show the approximate cost of each point based on the total number of points you'd receive over the life of the contract. (Again it could differ for contracts that have banked pts, or stripped points).
BCV $90ppt = 3.65
BWV $82ppt = 3.63
HHI $72ppt = 3.01
OKW $75ppt = 2.99
SSR $83.30ppt = 2.38
VB $60ppt = 3.60
VWL $80ppt = 3.50
As you can see, HHI and OKW are almost equal, but SSR much cheaper because of the extra years. Also, VB you can see is about $22 cheaper per point than BWV, yet in the end they cost about the same per point.
In addition to all of that info, I'd also add that you probably wouldn't have much trouble booking at the 7 month window. However, you may need to be flexible in what you expect to get for accommodations. If you are looking for a studio, you might have to get a pref. view (more points) to get the resort you want, or you might have to stay at a different resort than you want.
For me, it was more about the $$$ than where I wanted to stay. I figured I'd rather stay where the number of points for the rooms were lower (and where I could get the best deal on the contracts). That is what led me to purchase a resale at OKW, and then do an addon at SSR with one of the promotions they were offering. Now I have the bulk of my points at SSR, where I have the 12 additional years, and some points at OKW where I can book a week in a studio for 40 points!