A P-90 won't get you a humbucking tone. It's a unique sound - grittier with more mids than Telecaster or Strat pickups, but definitely not any type of humucking tone (and there are hundreds of variations). The dual-coil alignment of the humbucking negates hum from most external sources; it also cuts some highs and has various effects on other frequencies depending on how it's wound, what wire is used, the magnet type, size, position and strength, polepiece alloy type and other factors. So when you say you want a "humbucking tone" all you're really defining is that you *don't* want a bright sound typical of most single-coils. If you go through just the Seymour Duncan catalog you'll find dozens of humbucking models with various tonal centers, output and frequency response (and mounting - there are stacked ones as well). Seriously, it will take some research and time playing many models of guitars with different humbuckings to determine what you *really* want! There are wonderful humbuckings; slightly bland ones; and godawful cheap crappy ones - all made "generally" the same way!