No real complaints about the T56 Magnum. I've had a viper spec T56 and a TR6060 in the daily driver, and the T56 Mag has been the best of the bunch. I blew the viper spec one up because it was horrible going from 2nd to third. I missed a ton of shifts, and eventually it caught up with me
The I don't know that I've ever missed a 2-3 shift with the T56 Magnum and the stock shifter. Not that you're looking at a 6060, but the shift quality with the Magnum is better, I think mostly due to the fact that it doesn't have a remote shifter. Can't complain about something that is better than OEM stuff.
Only issue I've found with all of them is that they don't like going from 2nd to 1st. Of course, with your engine you'll never need to make that downshift.
Matt