I'm clearly in the minority, but I'm not sure I would really be that attracted discounted sky-diving. If I ever try it, I want it to be with some delta force or SAS guy who is VERY well paid.
They're all pretty similar. In fact, the lower price ones are probably safer because they've been doing it longer and have built an economy of scale. The small time guys doing beach jumps out of Cessna for $250 from 11k certainly aren't supertrained SAS guys :)