I really like the OG/WW guns and crew....and the Blacktree Design, well, less so. The BTD crew just look a bit odd to me - the helmets aren't quite "right". But, they look functional for what I need in my games, so there they are!
Today I received 3 German 105mm artillery pieces and crew from Warlord Games. Great looking castings. I think I'll be ordering some 120mm mortars for some heavier battalion support weapons from them as well.