I'd recommend the Omex 600 ECU all day long. Nice and easy to use and Omex will send you a base start file to get it running. Then you just have to get it running properly. Really easy ECU to get to grips with and the support is only at the end of a phone if you need it.

If you fancy a real challenge then a Life Racing F88RS ECU will keep your head up your arse for a while!!