where to invest???

hi all, back again looking for some advice from the group. not sure where to post so i thought i'd start here. saved up a couple bucks and was looking to upgrade cabling first. but actually i am not sure what upgrade/additions would benefit my system best and to take care of first. specifically my system needs: isolation for evrything(was thinking herbies), upgrading cableing, ic's and speaker(am using blue jeans throught, was thinking pnf, ps audio statement, straley), aftermarket pc's(currently using all stock pc's, was looking at TAD's jellyfish ironlung all around to start or ps audio powerpunch), OR upgrading power conditioning(currently using belkin pf30 and a quantum symphony. was looking at audiomagic stealth basic, blue circle noisehound products, maybe a ps audio product). i can only do 1 complete category for the near future(at least a year). where do you guys think my money would be best spent?
system:
dedictaed lines
jaton operetta 5140
marantz sr-6003(as pre)
totem dreamcatchers
ps3
belkin pf30/quantum symphony
bluejeans cable
THANK YOU EVERYONE!!!