Re: help me decide which amp
Marshall avt are just fine if you want to simply make your guitar loud... lol.
The tone is bland, the built in effects are superb (chorus, reverb and delay are)
Clean sound is alright, the built in speakers are pretty decent,
The point is that he has listed a tonne of more expensive and far better sounding amps, i have owned an Avt150 combo for almost 5 years.
The Marshall Tsl/Dsl arent bad amps, but id say they suit lighter rock more, the tsl's are a fizzy sounding high gain marshall with bland cleans.. a decent amp when cranked but theres better, the Dsl has better cleans and a nicer sounding drive but has a floppy bottom end when cranked and doesnt have as much gain..
Looking at your music styles the only one that sets it apart is the darkness, they have a more classic rock sound mixed with a model metal sound (Marshall 1959 SLP and Mesa Boogie dual rectifiers).
Personally i dont think the marshall jcm2000 series does a great job of emulating the sound of a Marshall 1959SLP.
Personally i would highly consider
Engl Screamer (also try the richie blackmore model)
Peavey XXX (Before satriani got his JSX he used these a lot)
Mesa Single Rect
Marshall Jmp-1 with a Poweramp (Carvin TS100, Marshall 50/50 etc)