all FI kits have some sorts of piggyback solution (Unichip, Splitsec etc) so the ECU is not an issue anymore, but the UTEC is still better than the current Unichip FI piggyback anyway.
Basically my advice, both cost effective and "unique" would be to buy a "tuner" package for a FI kit then add your EMS, fuel injectors etc and make it unique