I have a modded SF Line 3- HUGE $$$ capacitors; top-o-line diodes; resistors, etc.- we put $900 in PARTS ALONE into it- result? Well- let's just say it's one component I will never part with, and it will be the heart of any system I build- never underestimate what a great preamp can bring to the table.
Unsound is right though- it also mates well with SS (although I have mine with a ARC VT 100MKIII right now). It is VERY neutral, but also has the best bass I have heard from a preamp. The problem I had (with the unmodded stock version) was the mids- not quite 'involving' enough. Post mod though different story- more natural sounding, any perceived thinness gone, and allows the signature of each amplifier you mate with it to come through very clearly- highly recommended...
Unsound is right though- it also mates well with SS (although I have mine with a ARC VT 100MKIII right now). It is VERY neutral, but also has the best bass I have heard from a preamp. The problem I had (with the unmodded stock version) was the mids- not quite 'involving' enough. Post mod though different story- more natural sounding, any perceived thinness gone, and allows the signature of each amplifier you mate with it to come through very clearly- highly recommended...