Hi guys

I have been playing solidly for 2 years now and have got to a decent standard and I think it's time to upgrade my amp. I currently have a kustom dart 10fx amp and it just isn't up to the job. I play mainly AC/DC songs with a bit of Stones mixed in. So I was thinking probably Marshall is the best manufacturer but I'm open to offers. I'm looking for something that gives me more tone and definitely a tube amp!! I'm looking to spend no more than £500 so that's around $750.
It's purely for bedroom use so it'd pointless getting some big bad as amp that I can only turn up to 2 on volume.

Any help would be much appreciated.

Cheers guys
Orange Tiny Terror does a great job on AC/DC stuff. Check it out.
"Your sound is in your hands as much as anything. It's the way you pick, and the way you hold the guitar, more than it is the amp or the guitar you use." -- Stevie Ray Vaughan

"Anybody can play. The note is only 20 percent. The attitude of the motherfucker who plays it is 80 percent." -- Miles Davis

Guthrie on tone: https://www.youtube.com/watch?v=zmohdG9lLqY