I'm in the same boat as you. Just installed 2 of these into my system and now I'm shopping for a pre-amp. Based on some extensive listening, I would rank my choices (to date) as follows:
VAC Renaissance
VAC Standard
C2200
VTL5.5
The issue with VAC is that it'll take a month to get but the good news is that they have a solid top (no venting) so you can stack right on top if you have to. I don't really have the space for the McIntosh so if I go that route, I'll have to sacrifice another component for the space.
VAC Renaissance
VAC Standard
C2200
VTL5.5
The issue with VAC is that it'll take a month to get but the good news is that they have a solid top (no venting) so you can stack right on top if you have to. I don't really have the space for the McIntosh so if I go that route, I'll have to sacrifice another component for the space.