preamp suggetions for mid lvl system

many thanks for all the suggestions. But it seems that once you get to a certain 'level' in your music system the only way to 'flavour' the sound to your liking is to keep swapping units. (unless you spend obscene amounts of money I guess)

Would like to know how long one lets a 'new' piece burn in with the old system before deciding its better or worse

Keroo,
Might you consider a used Primaluna preamp? Tubes would smooth out most or any fatigue. Plunas are fairly new and are still in good condition.
I say go with tubes, the Plunas are well built, good match with solid state and deecent price used.
Good luck.

Oregon,
read a lot of good reviews about it, but I need two outputs. I dont think the PL one or two has two outputs.

Keroo,
I overlooked the 2 output aspect. However, a Pluna preamp just got posted on Adgon. You might inquire, but you are probably correct (just one output).