ThanX for the great reply, Familyman!
I do want discs on both front and rear (in fact, I'm going to swap the disc from my Bianchi), so I think the EBB is the way to go for me. I really love the feel of steel also, so a high-end steel frame would be ideal. However, I'm also considering both Ti and Scandium as both claim to have the "steel feel". I've not ridden either, so it's difficult for me to determine if these materials really have the feel of a steel frame.
I did look @ the On-One stuff, and the frames are really sweet. It would be tough to drop that kind of coin on a Ti frame without @ least some feedback on the true ride charateristics, though.