Using a trplie weber manifold and EFI throttle bodies you would get the same sound as Webers...
EFI would probably set you back about 5 - 6k to get it set up initially, but then you wouldn't have to worry about tuning the mixtures and balance every weekend like you would have to do with the Webers.
Not too mention starting up on the cold mornings with Webers can be a pain in the backside.
You should be able to extract more bottom end torque and top end power out of EFI due to its inherent tunability.
If your planning on doing a cam / head change in the future EFI would make things a lot easier to retune without the need to buy more main jets, idle jets, air correctors and emulsion tubes. These parts alone cost a fortune when you're tuning Webers and looking for the most out of them.
I used to use Webers all the time when modifying / racing, now whenever possible I go for EFI.
Just my opinion....