Recomendations 4 my 1993 EX

Hello! My 2nd post here!
I have a 1993 Civic EX with these mods.

Dc Headers 4-2-1
Nology Wires 8mm
Front Upper Strut bar
Rear lower Strut bar
Matrix cold air intake
Encore Whells (I think they are generic)
Dunlop w40 tires 205-50-R17
Short Shifter
Bypass Trick
Indiglo gauges
Super White bulbs

So.. Im planing to add more HP and I need to decide between these and I wish YOU to help me! I DONT want NOS nor TURBO.
Spoon, Mugen or (Bullfrog, Bullrog dont know how to speel it) ECU
OR take out the cat put a detonator (to reduce noise) and change all pipe with 2" and a stainless exhaust.

Wich would you recomend.
I think the ECU cuz my frinend told me that VTEC civic its redline is around the 7000RPM but my car can reach only 5800RPM!! So he tells me that I need a ECU and Exhaust system but I have money only 4 1 of them.
Please be in mind that I live in Guatemala Central America so is very difficult to me to find very good brands

Thanks!!!