i am using a 120watt crate right now, its good but i want something a little nicer. i play a lot of 80's metal type stuff (maiden, megadeth) and some instrumental. any suggestions for a nice amp under $1,000?

and a question about half stacks....im now sure how they work, if the head is 120 watt and the cab is 100 watt, do they have a combined 220 watts? or is it just having 2 seperate amps?