Model Power makes some very realistic HO scale cars. I’ve got a few Dodge Vipers, Pontiac Trans Ams, BMW’s, Porshes and the new Mini’s for modern era stuff. I think they are one of the best for vehicles. The make a Dodge Sprinter Fed EX truck and their old cars are just as nice. I’ve got a few Cobra’s, 69 Camaro’s and 55 Chevys that I’m going to use for a “Cruize Night” scene at a restaurant. I’ve got a few other but they slip my mind right now.
You can also check out www.walthers.com to check out just some of what’s available as far as scenicing and vehicles for HO scale.
There are quite a few manufacturers of great looking model vehicles in HO scale.
If you don’t yet have one, be sure to go to your local hobby shop and buy the Walthers HO catalog. There is a wealth of info in that book. Heck, it’s better than the Sears Christmas “Wish Book”! [:D]