You're saying "regardless of price" and you obviously want a healthy does of performance. Thus, the possibilities for you are endless.
You can go with a custom turbo set up or you can do N/A mods such as headwork, cams, etc. Honda motors seem to respond very well to head work. The sky's the limit if your budget is open. If you want to go quick and dirty, you can always go with a wet nitrous set up that would be very simple and not require ECU reprogramming. A 50 shot would give you that nice push you are looking for.
If all this sounds like too much work, you can always upgrade to more powerful cars such as the TL, G35, or Altima. Any of these 3 will give you a significant boost in accelerative performance. With the G35, you would actually have more of a chance to put the power down due to RWD.