I think the OP has to ask himself if he thinks the benefits outweigh the additional cost and complexity of the EFI system. The altitude and temperature correction of the TBI is nice, but that's not going to be any kind of return on investment for the application it sounds like this car is going to be used in.
The benefits are not measured by fuel savings. They include the hassle free driving and constant self tuning functions. Improved drivability makes itself notable by a driver who pays attention to his engine.
