My P-90 equipped LP copy (Agile 2800) can do single coil and humbucker tones equally well, and P-90s have a sizzle to them that neither humbuckers or single coils have IMHO.
I put a Rio Grande Bluesbar in the bridge of Dean Evo 60 yesterday and it smokes. Sounded a lot like the BBQ but brighter and more alive, if that makes any sense. Crunchy and clear!