Spaz, you didn't tell us your speakers, but if you want a full bottom end with little to no roll-off, choose a tube pre very carefully. The Calypso's output impedance raises to about 3,500 ohms at 20hz, so even your 20K input impedance (balanced) may not be enough for full-range speakers. The Calypso did not provide a solid bottom end with my DNA 500, which has input impedance of 10K ohms. OTOH, your Line3SE has output impedance of just less than 100 ohms, and should be fine. I owned both, and liked the Line 3SE better than the Calypso with my McCormack - the Calypso sounded too neutral without enough body in my system. The Line 3 SE is a pretty good preamp, if you want a large step up, you are going to have to pay a bit to get better, and not just different. There are also some very good SS preamps out there, but not many that have dimensionality that challanges a good tube preamp.
