I'd have to agree that Reaper is truly a great piece of software. I've been using it in the studio for a couple of years, and after converting an old road case to hold a slide-out flatscreen lcd, I've mounted my PC and interface in there and I've been using reaper as a live rig as well. Even with 16 armed tracks and countless cpu-hungry vst's, I've not had a single problem using it live. Even my amp sounds are modelled thru plugins at some gigs. I suppose you have to be pretty tech savvy to trust a computer that much, so running it live isn't for everyone, but Reaper is easily my favorite DAW to date.