Thanks for all the great suggestions.

One problem I'm having, is finding a bike that doesn't feel too small. Even the ones from Artizan's WWII range look too small to me.
When I set Phantom Ace next to one of these motorcycles, he makes it look like a child's scooter -- and he isn't even that big of a miniature.
Anyone have a photo of a decent sized bike next to Pulp Alley, Copplestone, Artizan pulp figure?