Megasquirt and wideband, it'll tune it's own fuelling on the way to the rollers where anyone who's never set a car up can easily find the spark tables. cold start isn't a problem, comes included in the many many available basemaps available for download and you can map your boost control, fan controls, water injection, shift lights, loads of shit. MS works with everything you've already got, you calibrate your TPS by pressing the pedal and it's ready to go. Decent, (but granted a bit dated) interface too.

Gotech plugs into the dizzy and costs about a ton more?
Cos weber is obviously good, but costs a fortune and you have to fuck about with triggers n adapters on threads for sensors and stuff.