Just so we're clear here, the thought of going N/A on a D17A* is almost cost-prohibitive. It is possible, yes, but that would take a full-on build, new top end, new bottom end, everything.
But if you've got the I/H/E already and basic suspension mods, there's really nothing else you can do aside from forced induction when you factor in the cost you listed. But, I almost hate to say this, you might want to consider a nitrous oxide system. Nitrous, when done right (wet spray system, upgraded clutch) isn't extremely damaging. If you're planning on building and are willing to step up your routine maintainence, you might want to look into this. A few members on here have done this and would be more than willing to offer their recommendations. Personally, I tend to view nitrous like a hot girl with an STD. I want to hit it, but I'm afraid of the consequences.
Here's some light reading to consider. This install is on a 2001 EX, but the concept's the same.
http://www.hondatuningmagazine.com/t...trous_express/