I like the Ergos a lot also, have the exact same one on my 556. I have one of Hogues newest ones on my 6.8, it should be released by now or in the next month, I like it ok, but its a wee bit small for me. I wear a XL mechanix wear glove and Xl or XXL in latex.
I had an Ergo for a long time but switched to the Magpul MOE+ because it was a little bigger. Really happy with the change even though the Ergo is a great grip, just a little narrow for me.
I was in the Hogue Proshop yesterday... Damn they have a lot of fun things in there! They have a couple new grips also that are coming out soon, one has a bit more of a palm swell like the Ergos. Im working on getting some of the new stuff to test, Ill let ya all know if its any good!