+1 on the LPS design. I prefer P90s in solidbodies (for a rocker) or full hollow bodies (for a jazzer), but not really for semi-hollow or semi-solids.
Wraparounds... don't skimp - they are crucial to the tone of the whole guitar. The pigtail is a good one, but the new Graph Tech Resomax is the best out there. Mojo Jojoe and I fitted one I got for review to his PRS singlecut and were both impressed. The stock bridge was lightweight aluminium and already sounded great, but the Resomax was even lighter (seriously - I think it's a titanium alloy, the studs weigh more than the whole bridge), added intonation adjustment, is magnetic (so it doesn't fall off when you remove the strings) and is incredibly comfortable underhand. Looks good too. Tonally it was great, clearing up the lower mids a little and adding a touch more of an acoustic quality to the upper mids. As mentioned, the stock bridge already sounded really good, so ultimately it would be down to player preference, but we both preferred the Graph Tech for the extra clarity that went a way to clearing up some 'bucker "mud". It is expensive,
http://www.graphtech.com/products.html?SubCategoryID=105
BTW, I always liked the Hipshot "Baby Grand" bridge too, which is a good sounding design and well-made.
http://www.stewmac.com/shop/Bridges,_tailpieces/Electric_guitar,_non-trem_tailpieces/Hipshot_Baby_Grand_Bridge.html
GuitarFetish hardware, I follow a simple rule - I don't. It's all cheaper Asian made stuff and while some of them may be Wilkinson designs, they are not made by Gotoh (who make all the better Wilky stuff), and fit and finish is usually at least a little iffy. Nice for cheap replacement stuff, but doesn't belong on a high quality build.
Studs - nope. Asian is metric size and usually larger, not readily interchangeable. Everything else is made to the Gibson standard, which is smaller and Imperial sizes. The TonePros locking studs are available in both sizes and inexpensive (not needed for the Graph Tech). Tonally I don't think there is that much of a difference - the strings pull the bridge up tight against the posts, but it does mean the bridge stays on without the strings.