Who/Cost for modding ECMS?

I don't know too much about these cars but, i ordered a set of the new "high Z 57lb" injectors that RACETRONIX sells and the high impendence(Z's) don't need the ecm to be modified.I asked ERIC STAGE1 if he could burn a chip for them with my stock turbo and stuff and he said he would and could so,i had him burn me a chip for them.I am upgrading to a larger turbo in a few months and so that's why i bought these 57lb'ers. Will someone say the pluses and/or minus' of using these over say using the 57lb low impedence ones that require a modified ECM?

No ECM modding required with 57's. Reds and Bob Baily does the ECM mod upgrage for low imp. injectors. I think it's $150 plus shipping.
(your ECM)