Re: I NEED HELP WITH MY GUITAR RIG
If punch is what you're after, I'd look at your cab first and foremost. A really punchy sound comes from a quality sealed cab and good speakers. A textbook example of a "punchy" cab to me is a 90's Mesa recto cab w/ Celestion V30's. These cabs are huge sounding and very punchy but can be kind of muddy sounding compared to the 80's Marshall dominated sound - which meant solos didn't cut through as well. As others mentioned take your head & axe into a GC or something & try out some different cabs. When you fin one you really dig, get the specs. If you LOVE it maybe you wanna snag it...
You don't necessarily have to go out and buy a new cab though. Peavey makes decent cabs but they aren't sealed very well, which robs a lot of the punch. I have Peavey 5150 cabs (using an original 5150 head - the head your 6505 is modeled after) and what I did was take the backs off and the speakers out and then run a bead of black caulk along every single joint inside the cab - especially around the speaker baffle! I let that dry for a couple days and then sprayed FlexSeal over the top of all the caulk beads. Then reinstall your speakers. I used this opportunity to upgrade the speaker wire from the crap stock 22-gauge to good stranded 16-gauge. This is also a great time to upgrade speakers if you want to - I changed out my slant cab speakers to Celestion greenbacks & V30's in an X pattern which makes a huge sounding cab that has punch from the V30's but outstanding midrange for solos from the greenbacks, making a great "do-it-all" cab for smaller venues that only require a half-stack.
At any rate, speakers aside, just doing the sealing will add a lot of punch to your cab tone & will only cost you about $20 & some elbow grease.