Good choice Raja! I've had great luck with tube pre's and my gainclone amp, as well as with several ob'd widerangers, SI coax, and conventional midbass drivers. May have to get a Mapletree myself, or one of Dmasons units if available (put me on the list Dan!).
B200's and a sub is tastey too in my experience.
A merry band of diy audio travellers we be...
Don