I'm in the market for the next step up from a beginner bass - logically, a good intermediate bass I could use for a while. I'm actually seriously considering stepping up to a six string, or maybe even a seven, but for now we'll work under the unlikely assumption that stay with a four. Anyway, I've progressed suprisingly quickly, especially considering that I don't really have a bass teacher. (Yes, I can read music, and yes, my technique is good. I'm not playing flat fingered or reaching over the top of the neck with my thumb or anything like that.) I need something on which I can refine my slapping technique (so it must have an exceptional slap tone [when played well, of course]), as well as something with which I could learn some double tapping. Preferably something within the $500 range. My favorite pickup combo is the dual humbucker combo that you would see on, say, the Schecter Elite 4. Fortunately, it's quite common. The P/J and J/J configurations are also good. Reccomendations? I realize the Fender Standard J-Bass, or possibly the Zone bass could be perfect for me, but I want to hear what you guys have to say first.