All this kicking of OS X isn't really very constructive... Since I have has the opertunity to run OSX and Windows on the same hardware, I can say that all performance issues experienced with OS X are due to crap hardware... can't wait 'till apple drop the crap PPC and use the superior x86 architecture
As for OS X security... it's been mroe secure than both Win2K and WinXP for me.
As For OS X stability, it's as stable as the most stable Unix I've ever used (AIX and Linux), beats the hell out of Windows and AmigaOS.
OS X has something a bit special for Audio users though... The core audio is excelent, low latencty, highly integrated and STABLE!