This is a serious high-end bass question. Please don't mention Peavey or Carvin (or Fender) in this thread. I need a 5-string fretted bass with "ultra low" action. It would be specifically for fast slapping. The requirements are: 1. Neck-through. Absolutely straight neck. No curvature allowed. 2. As quiet as possible, with a minimum of string buzzing. 3. Perfectly clean sound when playing quietly near the bridge. No string buzzing "at all" under these conditions. 4. Mad growl when playing hard near the neck pickup. 5. Perfectly consistent responsiveness and string balance. Price is no object, but let's keep it reasonable, say "under ten grand". I currently own a dozen basses, including F basses, Roscoes, Alembics, and several others I daren't mention. While all of these are excellent basses, none of them are "good enough" for the purpose I have in mind. Those of you who do this type of thing (fast slapping) probably know what I'm searching for. What should I be looking at?