Swanny are you planning on dumping a shit load of weight out of your car? If not I feel no matter how much power you make you will never be able to put it to the ground without breaking your transmissions and/or transfer cases.
From doing some reading on 3/S's I have came to the conclusion that the reason they have under achieved is not because they cannot make butt loads of power, its because they are huge ANCHORS that have suspect drivetrains because they are so heavy. You take a 3/S drivetrain and put it into a 2500lb car and it would probably be indestructable.
Prime example would be Matts J's VR4. When we were at Cedar Falls a few months ago he was having a hard time getting out of the hole really good (bogging launches). JET and I told him to set up his 2 step and anti lag. He did so and the next run he stripped the pinion gear in his transfer case I believe.
After talking to him he explained that he has gone throug a bunch of these already at 1200 dollars a pop. I asked if there was a more beefed up version that wouldn't break. He responded by saying "if you saw the thing and saw how much metal it is composed of you would wonder why its so weak".
Unless you have something under your sleeve Swanny or just plan on racing from a roll I have a feeling that your are going to be grenading tranfer cases quicker than AJ in bed.
Hands down Supras are far superior vehicles from a racers standpoint. There really should be no argument there if you know anything about perfomance. Yeah Supras are expensive and the interior is kind of ugly. Personally I like 3/S cars, I was looking at buying one actually for a daily driver, which is moderately modded would be great for that.
However if money was no object and I could choose between the two and I wanted to go really fast and not break shit everytime I drove it, it wouldn't take me more than a few seconds to pick the Toyota over the Mitsu any day.
If I wanted to do highway pulls and not have to shift out of third until well into 100mph than I would get a 3/S.
But what do I know I drive a GTP as a daily driver.