That's a great post from Robk. HPI has a few more BMW shells now and I think Tamiya has a couple more. Mostly they are M coupe models or maybe one is a standard 3 series. I suppose the handling will be similar.
I wonder if the Pagani handles anything like the Mclaren or the Saleen. It seems to be a bit more pointy in the nose, but still it has a small greenhouse and most of the body is low like that.
I'm afraid the HPI Lotus shells might be discontinued. I have not asked AndyH about it yet. It looks like it has gone the way of the Beetle cup racer. Which I loved in spite of it being all greenhouse and just a little bit downforce.