I am looking for opinions so all are welcome. Background: I play 2-3 times a month in a pop/rock/acoustic cover band. I also play some smooth jazz quartet gigs. We usually have PA support, but sometimes I need to carry the room in small to medium bars and restaurants. I currently use a Programmable SansAmp BDDI as a preamp/DI. That goes to an Acoustic Image Focus SA Series III amp and a Bergantino HT112. It sounds OK and is very small, light and portable - which is important. I play a Bartolini equipped Yamaha BB605 five string and a passive Yamaha 414 four string. Issue: While the BDDI sounds fine, I think it's missing something. Presence, a more full tone, something. I've had an Avalon U5 and an Eden 550 with this cab before and liked them but didn't like hauling a 4 space rack around. That's why I like the BDDI and Focus - they fit in my briefcase. What head/preamp would you suggest keeping in mind that I want to keep it small and light, but powerful as well. I'd rather not rack anything.