Go TCI, there the best IMO!!!!
The difference (I think) in Lock up & Non converters is bugger all, The advantage of a lock-up is more efficient on the highway, when your in 3rd and the rpm's reach a certain level the dizzy triggers the torque converter, this makes the trans a straight 1:1 with no lost power from conveter slippage.
The Lock-up has a "weak" spot, the torque converter is no larger than the non-lock-up version, the clutches take up the same amount of room there for generating more heat.
I was told non-lock up is the way to go, last longer. He could be wrong but I won't be getting one any time soon
I hope that helps some what
Anyone correct me if I'm wrong - I think that's all there. LOL