I really liked Grim2's model over his previous model. Grim1 wasn't bad, but Grim2 is fantastic. Reminds me of the Tom Selleck movie "Quigley Down Under", so therefore I ran with that for a paint scheme.
I didn't know what to do with Muggs and Krump, but decided to stick to the red shoulder pads and blue shirt. The brown coat on Krump turned out particularly awesome, and his gun as well. I pretty nearly like the paintjob on Krump more than I do Grim, but it's pretty close. The camera took a dump on Muggs though, unfortunately. I liked the grey coat, but not as much as Krump's.
With the purchase of Grim2, I'm going to try and push both of these casters as my 2 list format. Madrak2 is probably my favorite caster, but I don't feel he answers enough questions strong enough. He can handle armor skews and infantry skews, but he struggles against a lot of shooting, and doesn't answer Cryx. This leaves an anti-cryx list, but that's Grim1 or Grim2, and neither can handle shooting lists.
So I'm bringing Doomy2 as an armor/beast skew, and Grim2 as the anti-infantry/anti-cryx. We'll see how it goes, but I'm more confident about it. On top of that, playing Grim2 is incredibly fun. Madrak's pretty straightforward, and doesn't require a whole lot of shenanigans. Grim2 brings only shenanigans, and nothing more, and it's a lot of fun.