True the Challenger 2 is at 2500 polys, 3500 faces and thats the finished article, compared to the 2500 the Challenger 1 model had, but its not an excessive count, so you'd have to either have alot of them on the map, or a really old PC, from checking other user made models in the past, iv seen many with alot higher counts, Im at around about the mid range count, I like to think ;-)
But to get it as accurate as I did it really required this sort of count, I myself wouldnt be happy if it was a very low count, as it wouldnt look as nice, and as accurate. Saying that, I have cut out some detail, thats where textures come in though :-)
If I do a version completely covered in gear then it would maybe be too high a count to have, which is a bit of a shame.
anyway,
adios