Hey low frequency gurus, I'm looking to add a small amp head to my gear list and would like some recommendations. My short list include the Genz Benz Shuttle 3.0 and MarkBass Little Mark III. Criteria includes portability (fit in gig bag), reliability and under $600.00. Would be pairing it with a single Accugroove Tri112L or Epifani UL-112 speaker. Used mostly for low volume jazz, blues or acoustic settings. Using fretless Jazz & G&L basses. Thanks in advance for your experiences using these amps.