The SE 85/15s split incredibly well, cut through a mix with little to no processing in both HB and single coil modes, and have a nice "polished" sound already. In return for these characteristics, you give up a little "organic" feel. They are really quite unique in this way, and they make the SE play differently than other guitars. It's up to you whether you want this or not. I've performed and written a ton of music on my SE Custom with those 85/15s, but pulled them for JB/Jazz recently... time will tell if the stock pickups go back in. Heck, I've even done recordings without an amp and they sound amp-like... it's almost like there's a bit of amp sound built into the pickup.
Always worthwhile to play with adjustments, pickup height especially only takes a few minutes. I had success with lowering the pickups to be flush with the mounting rings, seemed to open them up a bit. Also guitar volume at 8, and lots of amp EQ fiddling.