No problem
You have just managed to jump out of the frying pan and into the fire, with that last question
Every Supra owner has his or her own opinion about which is best at the end of the day it comes down to budget and potential future plans. You are best trying to get a ride in all 3 variations, Auto, Tiptronic & Manual and making your own decision. Also throw TT and single into the mix.
Autos are great and are at the cheaper end of the market. They are unlike your usual Auto cars but the box is limited with how much Torque it can take. You can buy upgraded parts to strengthen them or an upgraded box. There is also an option offered by two of the Traders (Whifbitz & SRD) on here to fit an entirely new box but that is major work and will need the Syvecs standalone to run it "correctly".
The 6 speed costs considerably more to start with, prices in Japan are rising rapidly and they are becoming extremely hard to find in good condition. Supply and demand at it's finest. You can upgrade an Auto to a 6 speed at a later date but with the prices only going one way you are better to but a manual to start with if this is what you want.
I don't think anyone had ever destroyed a 6 speed, although if anyone has it is likely to be JamieP.