I've got a sub5, bought it new in 2003 for £700 (I think). I was using my stingray for a long time and mine ended up in its case under the bed for a while until I lost my job. Ended up selling my stingray because I couldn't bring myself to part with my sub5, so glad I kept it, it's a monster, does everything from precision/jazz tones to full on stingray. I put an sr5 pickup in mine, did improve the tone a lot, better depth and a rounder overall tone. They are so good they don't need much eq on them if recording, you can do it all with the on board tones. Best basses ever built.
The usa made sub basses have the exact same electronics and pickups then their ebmm counterparts. Dont know exactly what pickup you changed the original with.... but standard pickup is a ebmm pickup. And where did you get a original sr5 pickup? To get a new one from musicman you will have to send them a broken one.
hey, good to see you George