lots of choices:
-JDM P08 - still 1wire, setup for D15b from factory, prob a lil tricky to find
-USDM P28 - common as can be, fairly good tuning for a D15B in stock form, easy to find, requires 4wire O2
-Chipped P28 - common as can be, depending on chip/tuning potentially excellent tuning for D15B, easy to find, requires 4wire O2 unless person chipping knows 66K assembly
-convert your P05 CX ECU to vtec and chip it yourself - if you got the tools, certainly the cheapest and most rewarding way to go.
If you want help DIY, head to pgmfi.org
Myself or several others here can help you with a P28.
good luck.