I went to Hydroboost a few summers ago. Great stopping power and I can hold a lot more boost than I could with my aging Powermaster.
Parts aren't that expensive and I did the swap myself in about 2 days. That said, the swap was a pain in the butt (my first big job on the car) in my small garage.
There's a good walkthrough on this board and also on another one. I can dig out links and a parts list if you need them.
All said, I'd do it again. Great results.