I have an S2 Custom on order as well, looking forward to trying the #7 pickups that come stock. IMO, PRS has been knocking it out of the park with pickups lately, even in the SE guitars (the 245's are seriously good). Maybe the stock 7's will be great to start with?
Otherwise, the HFS/VB's have a nice split tone - they're hotter pickups, so they still have a bit of push when split, which gives a nice single coil sound. DGT pickups also have a great split tone, IF you can find them used.
There are probably lots of others, but that's a start.