I am very satisfied with my current set up. I use a Littlemark 2 head and a TC Electronic RS210 cab. I've got two cabs actually. Just incase I ever need more volume...... Anyway. I am interested in trying something different. A 15 inch speaker. So I'm looking at the Ampeg line of amps. Can anyone say that the Littlemark head matched with a 15 inch enclosure would have a much different sound from what I currently have? Or can anyone recommend one of the 4 15 inch combo amps? I plan on trying before buying but I am really looking for a little foresight from others who know better then me. Thank you.