$100/hp? Are you nuts? Get a used nitrous kit for about $300 (there's about four complete kits for sale on a local forum around here), and head to the dyno with various hp jets. Most shops will dyno-tune cars for about $400.
Constant power is nice, but for a car like the Accord, just getting decent power continuously is going to take big $$$$$$$$$. Nothing other than nitrous is really worth the investment IMO. Good part about nitrous is that when you sell your car, you pull the kit off and put it on whatever you buy. Pretty cost-effective power if you ask me.