Depends where your aiming really.
If you are only going to 1 - 1.2 bar so won't really need any fuel maps (but get it checked on RR) just get someting like the Greddy Profc B Spec II. Not as clever as some and doesn't have any fuzzy logic stuff but good solid performer.
If you are going after monty power and are going to go for bigger injectors / bigger turbo / high lift cmas etc etc etc then you are probably better off going for a full ECU replacement type like the Motec. It'll serve you beeter in the long run but will cost more to setup initially.
Cheers
GeeTee 8)