I'm personally not a fan of the lip curl mounts. I think it's hard to make those with the flehmen look good.
I think one of these days I'm going to have a wall pedistal done. It's a fairly new mount but I like the way it looks. I also like the corner mounts for something a little different.
As for the pose, I like a bunch of different ones, all but the full sneak really. I like the half sneak mounts but never have been a fan of the full sneak or neck mounts. I'm sure whatever you choose will look good. The only thing that I really don't like in mounts is when they are made too defined and look like they're on steroids!
I've actually got three to mount that I will probably be getting to either this weekend or next. I have a straight upright rut form for one and still need to order the other two, not sure what I'm gonna get either!