Check out the Marsh p2000t, it sounds great and very nicely built. The SS version got rave review from TAS, the tube version is even better. Nice thing is that its a hybrid and only has 2 tubes so not much to maintain, could have array of different tubes on hand to change the sound slightly depending on taste. Also check out some used Audio Research pre's have discovered even some of the older ones to sound outstanding, very detail and revealing.