Webers will make you smile. No doubt about it. They sound great and if you get a mechanic who really knows Webers and how to get the best out of them ..... it's great.
I've got a pair of 40s and I'm happy.
However.
Fuel injection will get you from point to point faster than anything else (apart from turbo fuel injection).
EFI would be more fuel efficient as well I would guess.