I've also been painting some Huns from Aventine Miniatures over the last couple of months. A lot of assembly is required, many are split at the waist, have seperate heads and lots of different equipment options, but it's well worth the effort as there are so many variations you can really make every figure in the army very different. They were a pleasure to paint, here is an example, and more pictures are on the Aventine site.
Size wise they a tiny bit bigger than the Foundry Huns, but fit well alongside some of the Foundry Germanics I have recently painted.
See them featured on the Aventine miniatures website http://aventineminiatures.co.uk/barrys-huns/