gsxr 600 itb's

[Niall]

For a NA setup, pretty much any aftermarket system will do. You can pick up things like a Omex with a loom brand new for £800 which is a basic easy going setup. You can save some money and go for something like a megasquirt but I've heard a lot of bad things about them.
When i was ECU hunting, i just stuck to the main 3. Omex, DTA and Emerald purely because they are the biggest and can give aftercare which is something you need when spending lots!