i am not a big fan of passive.... it does offer a clean listening window, however there has always been a midbass and bass suckout (foundation of music).
if you have $1400 to spend for pre / amp. would suggest the following:
amps -
muse 160 II or pse studio v mono blocks (muse is a little easier going while the pse is very dynamic. both were $3000 amps when introduced and are still very, very good. it took a pair of classe cam mono 350 to displace the pse studio v's in my system. pse v monos go for $450-$550 and the muse 160 ii goes for $650 - $750
preamp - bat vk3...incredible build quality and sound for the money..can add phono, remote, cap upgrade later if you wish..goes for $750-$850.. the only drawback to this unit is finding nos 6922's...
if you want solid state then a ar ls-12. it was their last solid state piece and in very uderrated (very long break in period- 6 months).. it is totally neutral and transparent...you dont realize it till you actually compare it to a passive unit..goes for $800-$900... add the cap for 6db upgrade if you are running single ended source ($65)...
audible illusions L1 - magical with the pse v mono blocks..great combo..used 6922 tube but less of them..really musical unit that has a little coloration in the nicest way... works well with the pse v monos and the 8260 (i have personally used the L1,8260, and pse v's- awesome combo)
hope that helps,
mike