I personally trust the hardware sequencer more than the PC one. Configuration problems, loads of tweaking and setting up and susceptibility to virus' are the woes typical of a PC based system. Hardware sequencer's are preset and ready.
Also wouldn't you agree that the utilising the hardware sequencer on a workstation synth like the XP60 is essential. How portable is a PC based sequencer + music hardware compared to the XP60 alone?
2 years experience of XP60 sequencing is enough experience. What I tend to do is compose on Cakewalk and then save as midi with sysex. It's then the XP can become a wonderful live control synth.
Bless this brilliant BBS