I've always wanted to open up a music store inside an old stone church that my dad used to preach at-- the architecture was Neo-Gothic, a popular style in the late-1800's. The church's congregation has since died out (or, more likely, died off).
For volume sales at "Cathedral of Rock", I would probably hook up with the Cort and Samick factories in South Korea, along with others in Indonesia and Taiwan, and submit a few semi-proprietary designs to be distributed exclusively through my store, similar to what Rondo Music does with their Agile and SX lines. Because the name brand will not be something mainstream, my customers will be charged a much smaller markup.
The midrange would be covered by guitars and basses from G&L, Musicman, ESP, Schecter, Jackson, DBZ (Dean B. Zelinsky), and GKG (Gary Kramer Guitars)-- most of these labels would also cover some of the higher end stuff as well, possibly throwing Wayne Guitars (Wayne Charvel's current operation) in there as well.
As for high-end basses, I would like to get something going with Geoff Gould (original founder of Modulus, for those of you who don't know the name), Mike Tobias, Mike Lull, Roscoe, and Sandberg.