I play both guitar and bass. Currently I'm using a Roland modeling amp for guitar and an SWR SM-400s with a Hartke 4X10 (no tweeter) for bass. I'm not completly happy with my guitar sound, and could really use some floor space, so I was thinking of buying a guitar preamp and using my SWR as a poweramp for when I want to play guitar (eventually upgrading to a seperate PA poweramp). But I'm afraid of losing to much top end from the Hartke cab. Could anybody recommend an affordable, quality cab with a fairly "flat" frequency response? Could anybody tell me why this would be a very bad idea?