I cannot wait to see this pack completed and get a set. I particularly like the one based on the AMNH mount - as far as I'm concerned, that is the best Allosaurus mount I've ever seen.
I also like the one lounging/scratching, and think it's completely within the realm of possibility for a life position. And for all the talk earlier about Allosaurus - bird comparisons. Compare away! If I wasn't such a big fan of the black coloration and skin texturing you've already done, I'd say throw some feathers on the big guy too. That might seem like a bit of a stretch... but I wouldn't rule it out, at least not yet.
" Way out West are boney clues of many an ancient clash, preserved by deadly sand and mud and dark volcanic ash, these late Jurassic sediments, the Morrison Formation, a record of the Allosaurus, Prince of all Predation..." - Jurassic Punk