We considered SSR last year as well since it would be about $5000 cheaper than getting BLT.
But, in the end, we knew we would just not be happy if we could not get BLT. We were not willing to risk the 7 month window so we bought in at BLT.
We even started out with a small VWL contract via resale, figuring we could just go with that to start, and then add on at BLT over a few years. Well, we added on 130 BLT points with in a week, and the another 50 points again two months after that. It was then that I realized BLT was the only place I wanted to own and put VWL up for sale just 2 months after buying it.
When it came time to book our early August trip, I loved being able to book BLT, knowing I had it. We did end up changing a few nights to BCV at 7 months, but at least if that had not been available, we had what we wanted.
And, even if we looked at DVC being only a 10 year commitment, I only spent an extra $500/yr to KNOW that I will be able to stay where I want. To me, well worth it in the long run, especially since I have plan on enjoying DVC for much more than 10 years!
Good luck!!!