Hey matey. If it was me i would chat to my engine tuner, which just so happens to be Track 'n' Road (01708 869189). Ive got Emerald on mine. I ran it on my 2.0 8v and then my 2.0 16v. It didnt use the idle speed control valve at all, just:
Air temp sensor
Coolant temp sensor
crank sensor
Throttle potentiometer
and I think that was it
I had to build the loom myself though. You probably need a comfortable budget but once you have management you can make the most out of every other mod you do. personally i'd go throttle bodies.