i looked pretty deep into this the other month after playing cd's for a while and realising it looked shite.
although i havent actually TRIED any of the products, i looked heavy into what they could do and what ppl were saying over the net.
the conclusion i came to was serato - most stable software and a nice helpful user community.
and then decided i couldn't be arsed with all the hassle setting up in a club and decided to forget it
so now i use mainly cd's to get the mastering right for my set, and the odd record here and there - looks miles better....
re: 5400 - well it might do. check the req specs for the system you want and ask the community on one of their forums. you'd definitely need some nice ram in there though mate.