with your mods, if you aren't going to add more air, I wouldn't spend the money on the injectors. Your gains would be very minimal without a bigger charger, and your cost would be pretty significant.
I think ball park exergy honed injectors and flow test are in the 2g range, plus the cost of your new injector. On the cheap end of the spectrum you can send your tips to Extrude hone and they'll hone them out but do not flow test them. Their quality is very good, and most cases you can get them honed for around 500. Again though with out an air upgrade you'll gain way more smoke than power.