Which type of tube monos for biamping?

I would like to find a pair of fairly inexpensive (under $2k) tube monoblocks to power the mid/tweets on my Von Schweikert VR2s (90db, 8 ohms). An audio friend/dealer let me borrow his Audio Note Quests. The sound was fantastic but unfortunately I just can't afford them and I think in this particular application the Quests were overkill anyway. Since I am only going to be using them on the upper frequencies, is a 300B design the way to go or is there a more affordable alternative that would provide me the same sound quality and adequate power?

Thanks,
Doug