I've been unhappy with the sound I'm getting, and now that I've gotten the string and pickup situation solved (Obligatos and Underwood, respectively;happy with both), I need to remedy the amplification setup and I'm at a loss as to what to get. I currently use a SWR Workingman's 10 for use in big band and smaller group situations that vary in size. Like other users have commented, I find the SWR 10 sound thin and I'm driving it way harder than I should be. I currently go straight into the instrument input without using a preamp. I'd love to hear opinions regarding preamp vs. no preamp, and personal opinions about amps. I've looked online at the Acoustic Image Contra, the GK MB150S and the Euphonic Audio combo (I would like to stay with a combo). Because I'm in a rural locale I generally research and then order and try it out, making forums like this very valuable. Thanks for your opinions.