PS which line is the guy on the left from?
He's an Artizan Texas Ranger from this pack:
http://www.artizandesigns.com/prod.php?prod=1028Thanks Mr D
They seem fine to me!
No problem, the Reaper guys vary a little in height, the rough and tough Texas Ranger for example is taller than the scientist I showed, while the female scientist is a little smaller. They mix fine when based correctly though.
Sorry, I meant the basing material - I really like that fine texture and that's a nice colour too.
I'll double check later on the colour but I think it was one of the old GW Foundation paints, it's brown

It's a good base to build up foliage on. The material is just sand, I mix a few grades together to get a limited variation, always sift it so that you can control how much of what size is in there.