Really depends a lot on what your goals are today vs tomorrow. If your goal is nice and easy street cruising and never pounding on it like a rental car, a 200-4R will not break your bank, lighter weight than the TH400/4L80E, and isn't hard to keep that torque in check when assembled correctly. Easy to fit to the car with stock GM parts that are still somewhat readily available. But the 4R will require a little beefing up. Which means a bit of investment $$$.
Compare the costs and weigh it against your long-term goals. I agree with a 4L80E choice though, if weight is not a factor. If you were thinking TH350 or TH400, the 4L80E is a no-brainer because it's basically an electronically controlled TH400 with an overdrive. No need for an after-market overdrive, and use the money you save to buy the controller for a lot less than the OD unit.
I can't recall specifically what it was, but I looked up parts for one before and found it uses some of the same parts (I believe it was a main shaft, or one of the shafts) as a TH400. BEEFY AF. Then if you wanted to put some power adders to your engine later, the transmission may not even have to be messed with. They can take gobs of power without puking.
Compare the costs and weigh it against your long-term goals. I agree with a 4L80E choice though, if weight is not a factor. If you were thinking TH350 or TH400, the 4L80E is a no-brainer because it's basically an electronically controlled TH400 with an overdrive. No need for an after-market overdrive, and use the money you save to buy the controller for a lot less than the OD unit.
I can't recall specifically what it was, but I looked up parts for one before and found it uses some of the same parts (I believe it was a main shaft, or one of the shafts) as a TH400. BEEFY AF. Then if you wanted to put some power adders to your engine later, the transmission may not even have to be messed with. They can take gobs of power without puking.