Buy your Sun Fac's... Buy many. They're a good worthy army builder. I'd say they're on-par (or better) than the AT-AT Driver IMO at this point. You get 2 weapons, pop his wings off and he's another warrior... If you can get past his eye scar, he's really one of the better army builders.
The leg articulation isn't bad due to their physiology too. I can get mine in walking poses, running poses, lunging poses, standing neutral... And arm articulation is as perfect as it can get.
With 2 unique weapons for Geo carniage, it's a great figure, so buy it while you see it. I wish I'd been able to capitalize on Sun Fac's during the TRU sale but alas he's not at TRU's here. The only place I see him is Target and in sparse supply in my area.
I've got around 10 I think... I'd like a large number more though. I'm hoping to run into a lot at WM to put on lay-away.