The DS7 is kind of noisy.
I played mine last week through a Peavey 6505, which is the same thing, basically. I wasn't super impressed. I think a warmer/fatter pickup would work better for that (although my DS7/custom DS7 work great for my setup. Think more like Meshuggah-meets-Nevermore tones).
Maybe the D Activator 7? In theory, the DS7 sounds perfect for you, but like I said - 1. I wasn't nuts about it in a 5150/6505 (my friend's Dimebucker sounded better), and 2. as Steve said, it's a better fit for mahogany than basswood.
My votes, if Dimarzio, are maybe the DA7 (which I have not played), or the Blaze/Blaze Custom (which I have, and love. I think they might fit the rather bright 5150 better overall.
