Never tried any of those. After reading through this thread thought I'd add a bit..
K motor + Auto = poo SOOO WRONG! - The bit thats poo in your setup is 2 speed, a 2 speed manual would be just as bad.
I have always driven Autos (except before I got my license) and have always found them faster off the line than any similar manual (this rules out the toyoglide as no one has a 2 speed manual ;) ).
Auto's can be just as fun, if you hold your foot to the floor they will hold the gears as long as you could possibly want.
As far as strength goes, I've never had a Toyota gearbox break before the engine did :)
I have a 20V 4AGE and I will be putting a 4 speed auto behind it (RWD), I have no doubt it will be faster of the line than the manual equivelant (unless you get a professional driver behind the wheel).
One downside I have had, once my Soarer kicked down a gear while I was flat out around a corner... that was messy :P