Why misc_model_static? Go for misc_model, I'm not aware of any big limitations regarding them (unlike misc_model_static, which should for one count towards the entity limit of 1024) though I never stress tested them.
And yes, I too think that you should just use brushes for visibility and physics and go for models otherwise. I'd have to do some research on lightmapped models, but I don't think they're particularly problematic.