Should I tune?

I have a 2001 GSR with a couple of mods, my question is should i get my car tuned now or do i even need to. Also if i did get it tuned would i gain from it.Here are my mods:


AEM CAI
dc exhaust
no cat
dc header
skunk 2 intake manifold
jg eldebrock type R throttle body
skunk 2 ECU
VTC AFC

thats it for the engine mods