I have owned a Line3 and Power3s for several years and have owned a Premier 11A and Premier 12s during this time also. I know the SF sound very well as well as CJ. The SF power amplifiers do have the tube bite/lushness but in a different way than CJ. With SVET 6550Cs and 500+ hours of use, the midrange is quite nice and are well mated to speakers that may be tipped in the high-end. CJs premier 11As have a very nice midrange but lack the bottom end. The 12s are very punchy, dynamic, but are very extended in the highend. SF is on the cooler side of CJ for sure. For control of difficult speakers (wide impedance swings), the Power series amps can't be beaten.
With regard to preamps, the SF line series is pretty nuetral sounding but not solid state sounding. Replacing the main output 6922s with Mullard will yeild some very nice textures in the midrange if that is what you are desiring (excellent for vocals). The CJ preamps will be more warm but lack the detail that the SF line series will present. Personal perference will determine which is better.
Several folks have commented on your speakers. The B&Ws are not warm speakers at all. You can change the upstream electronics all you like but the source (What are you using by the way?) and the speakers will make the biggest difference. If you want to experiment with the preamp/amp, borrow a CJ preamp and see what you think. I'd leave the Power2 alone for now as you'll need Premier 12s or a 140 at a minimum to drive the B&Ws. Along with the preamp, I'd experiment with different sources as well.
With regard to preamps, the SF line series is pretty nuetral sounding but not solid state sounding. Replacing the main output 6922s with Mullard will yeild some very nice textures in the midrange if that is what you are desiring (excellent for vocals). The CJ preamps will be more warm but lack the detail that the SF line series will present. Personal perference will determine which is better.
Several folks have commented on your speakers. The B&Ws are not warm speakers at all. You can change the upstream electronics all you like but the source (What are you using by the way?) and the speakers will make the biggest difference. If you want to experiment with the preamp/amp, borrow a CJ preamp and see what you think. I'd leave the Power2 alone for now as you'll need Premier 12s or a 140 at a minimum to drive the B&Ws. Along with the preamp, I'd experiment with different sources as well.