Ok, I AM a dj and ive been using a pc from scratch.. so i guess i will be the voice of the PC in the MAC forum lol..
IMO a well tuned pc will run just as good as ANY apple product.. I'm using a 5 yr old hp laptop with a amd 64 mmx processor with 2 gigs of ram (just upgraded to windows 7 from xp) i have and do on a regular basis play 10-12 hr sets using virtual dj pro (which in itself is a pretty processor hungry program) and i can honestly say that in the 5 yrs ive had this thing it has only crashed on me once while playing.. and that was due to an external hard drive taking too long to read.. granted the PC did not run that well out of the box, i have tweaked and tuned it to my needs.. and i have never used a mac to dj with but i find it hard to justify the 3000$ you have to spend on a mac to do what a 1200$ pc will do just fine.. i guess the bottom line is how much do you wanna spend vs. how much are you willing to work.. they probably both have their own list of pros and cons and in the end a computer is only as good as its user.. T d-.-b