I am a new lawyer who travels a ton in my practice. Continental

comped me silver elite status for 2000, even though I didn't fly once on Continental last year. Thus far I'm 8/8 on upgrades.

I am on pace to at least earn silver next year, maybe gold.
Because I am a Continental Elite member, I have gotten a "Fast track" offer from Hilton for their VIP status, which I'm certain I can make.
I travel enough so that these points can really rack up. I am curious if other programs might match the "fast track" offer. I tend to think they would. Problem is that I need to pick one to join and then concentrate on that.
So, Veteran Flyertalkers, please help me.
Which Hotel Affinity program is best for me?
I am leaning towards Hilton, because I have about 12,000 miles each on 4 other airlines that I will never fly again (TWA, DELTA, UNITED) that I can reverse into Hilton points. Plus it seems like Hilton has more decent business hotels at which one can earn points now that Embassy Suites and Doubletree are in the loop.
Please help!!!