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

My 68 Charger started with a 904, then went to a 727, then went to an 833, then a TKO, and now I'm swapping in a T-56 Magnum...

Times are changing for sure - I used to pick up 833s for like $250-$300 *back ~2005-2010 and now I can barely find ANY for sale... when I do they are $750 plus... crazy -

The TKO was a nice trans as I wanted OD - but now I am going to the T-56 so I can run a shorter rear end gear and still cruise nicely.