I am looking into Tube Preamps, and I only need single channel. I sometimes record direct guitar via the recording out on a Roland Cube (going into Tascam US1800), and though the tone is very good for what I need, I want to add a touch of natural tube warmth/compression. I am sure I will use this at some point to run a vocal mic through as well, but mainly will be guitar. Dont want to break the bank, but dont want to shoot myself in the foot buying something too cheap. Open for ideas, Thanks