I'm thinking about buying an amp soon and was wondering about the 6505 Peavey model. Yeah, I looked through the various threads and saw that there were tons of posts with them mentioned and talked about but I have a few more questions.

First off this will be my first step into the world of tube amps and I was wondering if i could get like a list of stuff that Tube amps do specifically better than others.

Secondly I've read in one thread that the Peavey 6505 is pretty damn good for heavy palm muted stuff (thrash, death) and thats exactly what i was looking for but i also read that it doesn't really sounds good without whats called a Bias mod. I have no clue what this is really and was wondering how much extra would that cost and what in particular would change with the amps sound.

And lastly what would be a decent price for a used model of the discontinued 5050's. It seems like there isn't anything different between the two so maybe i should just go used.

Tube amps as opposed to solid state amps generally sound better as you crank them where as with solid state amps, they sound worse as you crank them.

the 5150/6505 can definitely suite death and thrash metal. I personally think the stock 5150 head is a little cold sounding. just my opinion.

for a used 5150, I'm sure you could find one on ebay for around $500 give or take.

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I'm really tryin to save up for a 5150 after finally picking this over saving money for Engl and some other amps. It's like now I've got another dilemma: Should I get the combo or the half-stack? I'm screwin around w/ my friend to kinda jam in like a "band" and he's got a JCM 800 half-stack. I'm wonderin' if the combo can stand up to like that and drums if we were playing.