There's been some great amps mentioned here. Ultimately, though, the amp is only a part of the "sound"--sometimes a much smaller part than people think.
There was an interview a few years back in one of the guitar magazines (back when magazines actually were printed) where a well-known guitar player was commenting on Eddie Van Halen's rig. The guitar player said something like: "Man I was like everybody else, wondering what EVH did to get his great sound. Then one night I got a chance to play through EVH's rig--his guitar, his amp, his pedals, turned to his usual settings. It didn't sound like EVH though! It sounded just like me trying to play a EVH song on my own amp!" I've read similar comments from people trying to cop the SRV sound by exactly duplicating his setup...nope, didn't sound like SRV.
On the other hand, I've seen some guitar players that used the most ordinary of amps and sounded practically as good as any of the original recordings. I've seen guitar players get great sounds out of a Peavey Bandit, it's all about knowing how to set an amp, how to use your guitar's tone and volume controls, knowing where and how to pick and fret on the guitar, and you don't need a $3000 Les Paul either, a simple MIM Tele can sound great in the hands of a good player.
And sometimes we form misconceptions about what amps can or can't do without realizing their capabilities. A Fender Deluxe 5E3 tweed, for example, some folks think that's just an amp for blues or clean country, not realizing Neil Young used that amp for Cinnamon Girl, Down By the River, Cowgirl in the Sand, Cortez the Killer, etc, just that amp cranked all the way up with no real pedals.
So I'll conclude by recommending that you evaluate what your real needs are as far as your amp, and not to get obsessed with duplicating somebody else's amp. How much volume do you *really* need, I've played a lot of times when an 18 watt combo amp with a single 12" speaker was more than sufficient. What channel switching do you need, would it be best to just have a great clean channel and get al your various sounds out of your pedals. Are you actually going to be playing out through this amp, or is it just going to be for home/bedroom practice.