Look at M tech V4, ecu, loom, set up for around £650, pm danny from PE.
There are a very very few rare occasions where the difference is extremely small between the best set up carbs and efi in terms of drive ability, even rarer when the carbs score a few ponies, but seriously rare.
The sheer driveability between big carbs and efi is really like night and day, in general efi is better for power and torque all across the rev range with vastly better low speed economy/emissions, and requires regular tune ups, unlike efi, once sorted it's sorted.
Big carbs such as dcoe/dhla 45/48 can be a serious pain in the rs at low speeds, traffic.
tabetha