I haven't had any real track time with any of them, as I'd liek to get all three running before, I head over there. The 8ight-t had its MMM die during its first run, so I don't know tech run time it will be getting. However, out of the CRT.5 and 8ight, I can get about 40 minutes out of each while bashing more or less. It all depends how you drive.
The only reason I am running the MMM is because the MM and UBEC take up way too much room. They fit, its just that all the extra wires make it look really sloppy.
BTW - I redid the servo, ESC, receiver mount and battery tray on the CRT.5.