Going in a Funtana .40. Can't decide between these:

Saito .82 (leaning twards)
Saito .91s (cheaper than the .82)
Enya .80 (heard enya was good and very reliable)
YS .63 (good motor but needs 30% nitro to run well)
OS .70 (user friendly and good reputation)

Which one would you choose?????