Sounds like you've already made up your mind, and want the S/C with EFI.
However, if I had a $10k budget, then I'd go the other way and swap the engine for more cubes, better pipes and air intake management (ie: lowering air temps, ceramic coating, fitting shrouds under the bonnet to direct air flow), and swapping out the rear end for something taller.
$10k can get swallowed up really quick with EFI and S/C. Its not just the parts, but tuning and chasing gremlins.
If I had say $15 it might be something I'd consider, but then again, for those dollars, I kind of see it like Patrick, and would be queuing up for an FE. That's just me... Good luck with it
