TO FLYINGVGUY OR ANYONE ELSE LOOKING FOR METAL AMPS:
ok lets just make a run down of heads first
Engl:
thunder- it's pretty awesome. gives good tone. it really is "less is more" not a lot of options but awesome tone. IMO a little expensive. and you can get a lot better for the price
fireball: obviously a lot of good talk about this thing. awesome tone, cleans are great. unfortunately its only a single eq for each channel. idk if that matters to you. its hard to get for me at least. but im in the u.s.
Peavey:
valveking: like you said its alright but not the greatest. it defiently wasnt made for extreme metal, and you would need a dist. pedal to get good "brootal" tones. (PLAYED)
6505+: fucking awesome amp. it really blows away a lot of amps. a shit load of distortion. you will never need that much

fucking great amp, the bass response is fucking amazing. no qualms about this baby. (PLAYED)
Line 6:
spidervalve head: wow. this thing IMO is fucking amazing for all types of music. it has so many fucking features its insane its only 800 bucks. i can get the most amazing cleans and then switch and start playing cannibal corpse. all around great amp (PLAYED)
hd147: i think this amp is pretty good. but it reminds me of the "digital/fake" sound that line6 is usually associated with. especially with its spider series. its certainly a step up but not worth the money. it is a nice amp though (PLAYED)
carvin:
v3: this thing is fuckin awesome. it has some really great bluesy cleans and has tons of gain. a lot of headroom to. really nice price, tons of features as well. (PLAYED)
legacy: this baby is really fucking nice for soloing definetly. some of the best tones for solo's. but it really doesnt have tons of gain. its a really nice amp for soloing. but for metal, it seems like a 70/80's hard rock amp (PLAYED)
Bugera:
they havn't come out yet in america at least. but maybe you can grab one wherever you are
6202: obviously this company is pretty much a "rip-off" of peavey. but i've heard clips and it emulates the classic 5150 tone but adds its own flavor. and the price is fucking awesome
333xl: WOAH. lots of options with this thing. 3 channel, sep. eq for all of them. you can go from blues crunch to blistering metal
Genz Genz:
El Diablo 100: well it gave really nice rhythm but it was hard to get a nice lead sound. it sounded very...idk how to explain it. it was a good amp, but i just didnt have time to dial in a right tone. (PLAYED)
Randall:
randall v2: fucking amazing amp. i love the 6 band eq. you can really dial in a lot of different tones. i could defiently tell why michael ammott uses it. (PLAYED)
honorable head mentions:
peavey jsx, xxl, xxx: all good amps. i like the xxx the best. i really didnt like the jsx at all. i've heard you can get really nice metal tones out of it, but from what i was doing with it, it really didn't give me much of anything. and week after week my other guitarist in my band brings his and i always hate it.
randall v2: fucking amazing amp. i love the 6 band eq. you can really dial in a lot of different tones. i could defiently tell why michael ammott uses it.
the heads that i havnt played, i know people that i trust that have given me reviews on them
Cabinets:
obviously all the stock cabs that go with the head will suit it pretty good, but here are some afterthoughts. i dont feel like giving reviews. sorry
genz benz g-flex 2 x 12
vader 2 x 12 (or 4 x 12)
marshall 1960a cab
hope that helps anyone