First, congrats on the "newly married" status!
DW and I are empty-nesters, and we bought 300 points at SSR. That's a bit much for us right now, although we're not having any problems using up the points, and it's nice not to be in perma-borrow mode. I second - or is it third by now - those who said that you probably want to think 1BR, even for the two of you. Our first
DVC stay was in a Studio, and while that was nice, once we'd experienced the amenities of a 1/2 BR - full kitchen, separate living/sleeping space, hot tub, lots more room - I think that a Studio may seem, ahem, a bit cramped in the future, particularly for longer trips.
So take a look at the resorts and
point charts, figure where you want to stay (SSR from Disney, others via resale), when you're likely to stay and for how long - then see how many points that would be. Then triple that

; no, then buy a few more points than you need. Budgeting for a 1BR will take you through your first two or three children. Be warned, though - you wouldn't be the first to post here saying "we only go every other year", then end up making yearly - or twice-yearly - trips!
If you're talking more generic lifestyle issues, DW and I love WDW as a couple; thrills, excitement, adventure and romance - and that's while we're still in the room!

Seriously, DVC is great for all life stages.
Good luck, and keep asking those questions!