Synstars

Yo! New to the forums and audi's in general. I have been a rotary fanatic, miss my rx-7 T2 T.T

Anyways I have had boost and power problems almost since day one!

It's a 2001 amu turbo with 96k miles now. CEL light finally gone, thank god, but the abs and ESP lights keep coming on (assuming abs sensors only)

Work done to get her in good shape:
Fuel filter changed
Kn air filter
Forge dv, turbo I take hose
Replaced top vacuum lines (lower are on the way)
Cleaned the maf
Blue flame downpipe with arp full exhaust using test pipe
O2 sensors replaced
Replaced rear diff (previous owners never serviced it and gears were grinder off)
Forge short shifter
ECS n75

Next steps is to get stage 3 modshack performance kit and a remapped ecu.

NOW my question...I hear and read much debate about what kind of remap/flash to get, what company is best etc... I am quite confused on the perks and concepts of remapping since my RX-7 was custom tuned.

Thanks!