I prefer the weight & heft of the G400 MAX, I've tried a few of the light & super light head/combos years ago and I was wilder and more all over the place with them than I usually am. I like being able to feel (sense) where the clubhead is & I don't care if it costs me a few mph in swing speed, I'll take quality shot results over quantity (yards) every time.
G400 MAX with a 44-1/4" UST V2 "r" works nicely for this 70yr old, but YMMV. The stock Alta shaft just didn't feel right to me. Also, wasn't worth the time & effort to go back & edit this for 3rd person content ๐