Rattus, PlayerPro is pure SHITE. The interface is mega poop. Protracker it's where it's at.
Try Octamed, the interface is nice, and the output you get from it is tops. BUt seriously, PlayerPro is seriously flawed. That is NOT the standard interface for a tracker, Protracker's is. No wonder why it has been copied all over the place.
Musicline is excellent, but if you are daunted at Protracker's interface, avoid musicLIne until you are experienced with trackers. Also, you will enjoy it to its fullest with, at least, an 030 processor.
My advice is: start with OctaMed or Protracker, then try others, as Twist suggested.