i have the MOE+ grip on my AR. I love that grip. it is the MOE but rubberized. but like the MOE, it isn't a perfect fit on the 15-22. there is a space between the rear of the grip and the lower receiver. that kind of stuff drive me nuts.
i think the ergo has a space too, but not as bad as the MOE?
i got the hogue on my AK. rubberized, feels very comfortable at first, but during actual shooting, i don't like how it forces my fingers into the finger grooves... it doesn't match up to hand's natural grip. i wear 7 1/2 medical gloves if that helps any. a lot of people love the hogue. i won't change mine out for now, but i wish it didn't have such deep grooves.
the easiest install is the MOE-K, but that has a smaller grip circumference, and since you said you have large hands, it may not be a good fit for you.
if i were you... and what i did, was to buy the magpul MIAD grip. it is modular. you can change out the backstraps based on hand size. there is also a removeable a2 style finger groove you can use if you want.
word of caution. if you don't use either of the 2 larger backstraps with the thumb groove, the spring for the rear take-down pin will fall into a groove and your take down pin can come out when pulled out. this is pretty well documented and there are fixes for it.
anyways, since you have a larger hand, you can experiment with the different back straps and front finger groove until you find a combo that works for you.
ALSO..... you will need to buy the AR-10 grip wedge. it will take up any gap there is between the grip and the lower receiver. only like $4. it isn't compatible with the MOE from what I understand. Could be wrong.
yeah, so my 2 cents, Magpul MIAD with the AR-10 grip wedge.