Thanks for all the kind comments everyone.
We honestly didn't really decide to "do it" until during dinner the night before we "signed". We actually hadn't even talked about it much after we got home from the January trip. I think we both mentally decided we couldn't do it. But in talking over dinner (it's amazing how well you can have a discussion without the kids!), we realized that:
1) We've been to WDW 5 times in the last 4 years. We're gonna have lots of future visits. WDW hotel rates go up an average of 8% per year.
DVC will shield us from that. Dues, while legally capped at 15%, have only gone up 3% on average a year.
2) We're quickly outgrowing one hotel room. All five of us stayed in a YC and Poly room w/ daybed last time. Our oldest is 12 (daughter) and her brothers are 9 and 4. The room was a bit "cozy" with the five of us and all of our stuff. The villas will address this problem.
3) Since January, DVC has upped the first year "buy-back" to $10 per point so it knocked about 12% off of the price. Plus the finance rates had lowered, so the monthly payment was less than we first thought.
4) The attitude of the agent we worked with was so "no pressure" that we had a comfort level with him that we've never had with any other realtor, car salesman, or builder. Not even close.
5) It's Disney.
We can honestly say that we have yet to experience any sort of "buyer's remorse"... Which for us is a first with any major purchase. After every home, auto, major applicance, etc. purchase we make, the "What-have-we-just-done!" thoughts started to flow the second we walk back to the car. Not this time! Not one thought.