Synthetic ATF's are the best.
I like the Pennzoil and Aamco fluids. I've noticed that the fluid looks less for wear with a little lubegard added. And, the tranny shifts better with it.
I do a drain-refill twice a year with Redline D4.
I was wondering how the Lubeguard performs. Did you get the Lubeguard Platinum in the silver bottle, and where did you buy it? I might try it.