Re: new amp
Some of those 900's get some wicked tone. Don't let anyone tell you that all 900's suck. There are plenty of 800's that blow also. It's all about dialing in a good setting, and making sure you have the right set of tubes. Changing your pre-amp tubes can make a world of difference in your tone, then power tubes. There are also a ton of mods out there for people who find the amp's are too bright, too grainy...ect. Usually just a small resistor or cap value change away.
Marshalls are the amp for me (except for jonsey's Bogner which I still drool over). Enjoy and let us know how you like it.