ok. right now i run a line6 pod xt live through a crate powerblock to a 4x12 marshall cab. the problem im running into is that i have to use so much compression and noise gate to stop feedback that i can't get any pinch harmonics. im sure its not the guitar, i use a schecter c-1 hellraiser w/ active humbuckers so it should be able to do them all day long with no problem.
so my question is, do i need a better head that can handle the volume levels without using so much compression and noise gate and if so, what head should i go for?
are you using the fx loop or are you running straight to the front?

Ibanez S370 (all custom)
Mesa Boogie Studio Pre
Fender Champ 25se (used to power Mesa pre)
Custom 2x12 cab w/ Eminence Texas Heats