Personally, I'm a big fan of OpenMPT -- it's well worth checking out. It's perhaps not as 'pro' as Renoise, but tbh, I think that you can produce results that sound just as good. Ultimately, it's not so much about the program as the skill of the musician and their ability to use the program. (That being said, yes, you can be severely limited or severely aided by poorly- or well-written software).
OpenMPT FTW! Jojo, back me up on this.