Reaper CAV

I've been looking at the Reaper Cav line - I have some
of the hover APC's and they are just perfect for small
dropships in the Landing Boat - sized range for DS,
but I don't know how big their other figs are. They're 10mm scale, but I was
curious if anyone thought they could pass for bigger 6mm (the aircraft) or
asmaller 15mm vehicles (the AFV's) or 25mm mm Infantry walkers (the walkers,
of course!)? Also, has anyone tried playing DS or SG in 10mm?