Manual trans swaps: Cheapest vs Easiest vs Best Performing vs Best Driving Experience

Cheapest vs Easiest vs Best Performing vs Best Driving Experience - which swap fits these categories in your opinion?

There are quite a few options out there for people who are foolish enough to remove a perfectly good 904 or 727 but it's hard to find comparisons of how the different options stack up. They're all pretty expensive (at least they are from where I'm sitting) and they'll all require quite a bit of labor so getting it right the first time is pretty important.

The typical choices range from 3spd which could have been had if someone didn't check a box on the order sheet to a modern Tremec T56/T6060 that wasn't invented when the last of our cars was rolling off of the assembly line.

A833 is a common choice but this trans was available in several different versions over the decades including heavy duty units that could survive behind a 426 Hemi to later models with an aluminum case- are there resources out there on the pros and cons of the different versions?

Which necessary parts are hard to come by? AMD still offers the floor/shifter mount...are there reproductions of everything else we need?

Anyway- your opinions are welcome.