Hey Adam, I own and play a Fender '51 P-Bass Reissue. I have had it for about 4 years now and gig at least twice a week with it. I am running it through an Ampeg SVT-450 head into an Ampeg Classic 610 cab. The pickup that comes in the bass is just a stock single coil pickup. It has done well, but I just cant get the right sound out of it. I am looking for a nice clear tone with plenty of punch as well as a nice low end when needed. I play a slightly poppy kind of straight ahead alt-rock style of music. Something like the Goo Goo Dolls meets Coldplay. I mostly play driving bass parts and I keep a solid kick groove on slower tunes. Right now, when I play with the tone nob, I either get flat muffledness on one end or thin, high, clackety noise on the other end, and theres really no happy medium. I really love the bass but the pickup issue is really starting to become a pain. I'd like to find a pickup that already fits in the hole thats there if possible. I've been told to buy active pickups, stacked humbuckers, and Bartolinis. I don't really know what to do, but I am open to suggestions...please help me find that killer tone!