DNJ, the Macs have some pluses but in the main PCs are just as good for music after some tweaking of the Windows XP operating system.
http://www.musicxp.net/ http://www.nemesysmusic.com/pdf/optimizing-xp-and-2k.pdf As has been stated previously on this forum there is far more software (including music) written for the PC. I would stay with a PC. Over the last year I have had may be a handful of crashes. These usually occur when I was editing large instruments or installing doubtful software. You would never do this on your performance LT!!!
STAM, yes hardware synths (keyboards or modules) often have latency around 10 ms. You can search this information on some of the forums I have indicated in a previous post. You can also check this on some of the SOS Reviews of GigaStudio, Kontakt, Halion, etc. It is just the way it is!!! Don't forget many of the keyboard manufacturers used 486 Processors until recently. Yes, they may use more than one processor (sound, effects, etc.) but it is hard to keep up with the top of the line sound cards and 3.0 GHz Pentium Processors.
Also, as I noted previously, once you get to latency of 10 ms or less most people won't notice it.
[This message has been edited by Frank L. Rosenthal (edited 08-31-2003).]