Double Neck with a Bass VI on top and a Mustang on bottom. Call me crazy but that's probably my dream bass.
EDIT: I would also a bright red ash Bronco with a custom white pickguard, Seymour Duncan Hot Rails and Seymour Duncan Cool Rails, Seymour Duncan Vintage Rails, with 3 switches for coil splitting each one. And a 5 way selector switch for selecting pickup variations. 1 250k volume pots, 3 no-load 250k tone pots, and a Musicmaster bridge. To top it all off, I would do a Maple Neck with a Rosewood Fingerboard and Gotoh GB350 Res-O-Lites for the tuning machines, all matched with a matching red Washburn-style headstock. A man can dream!
EDIT: I would also have a tricolor Sunburst Precision with Seymour Duncan P Quarter Pounders that would be sandwiched in between two SD Jazz Quarter Pounders. 3-way selector to choose between P pup, J pups, or all three. 1 250k volume pot, 3 250k tone pots and a side output jack. It would have a Geddy Lee neck. The pickguard would be black. Boy, these fantasies are totally overboard.