Tubes or Solid State?

I'm looking to replace my solid state Musical Fidelity M2si integrated amplifier that I've been using as a preamp with a dedicated preamp. I have been considering tube line stages from Maple Tree, and, Van Alstine and the LSA Hyperdrive Preamp/Headphone amp. I am also looking at the SPL Elector MK2 which is solid state and a bit more money.
The tubes are supposed to be warmer and the SPL is supposed to be absolutely dead quiet. 
Thanks