best chip /upgrade for d16y4 ecu

Hey fellas, just after some advise for my next mod. :thumbsup:
Im after a s100 hondata or something similar in price. Was quoted around $1,100 installed and tuned. I dont want to go all out on a s300 or similiar cause i dont plan to keep the car for more than 1yr. So far i run 2.25 full exh, 4-2-1 headers, ram air kit which goes into bumper.

Can someone tell me if there are any other options for tuning this ecu (cheaper the better), i believe its a odbII cause its from a 98 model civic.?
Any advise would be greatly appreciated.!
(ALSO)
Does anyone have a s100 hondata forsale???? Let me know!
Cheers amigos!