You MAY be interested in a Variax for tonal spectrum. Otherwise, I am of the school of thought (and practice) that you need a Les Paul, a Strat, a Tele, a Gibson 335 and something, anything, that plays dirty. Ibanez with dirty pickups, etc.... alongside your favorite acoustic (Ovation for me).

Not much help, was I? That Variax has always seemed interesting to me. Turn of a knob and you are playing a totally different guitar, different tunings, effects, etc..... The downside is that the main board likes to go out in humidity.