Alex -
I'm not following you on your statement of "when I look closely there does not seem to be much of a difference between what you actually get in terms of what these sites can do for you."
There are HUGE differences between all the site hosts. Some only offer Flash sites, others have ways to incorporate Flash in a way that doesn't hurt your search engine standings. Some only offer template sites, while many will create something custom for you. Then there are tons of side products a vendor might offer: SEM, SEO, Video, Special Inventory modules, ILM, Inventory control with 3rd party pushing, and more! However, the most important difference is a site host's ability to innovate - this is where you really see some major differences when you look closely.
The big hot button for me is being able to control my own content on any part of the site. Dealer.com just moved to their V8 platform which allows a lot more flexibility in this area. I see you're on a Reynolds and Reynolds site - we used to be on their stuff because they bought AutoMark back in the day. It has gone way down-hill since the AutoMark days. We still have our Scion site with them, and I am pushing hard to migrate that away from Rey-Rey. Then I'd love to get to work on getting VW and MINI to give-up on force-feeding their dealers CoBalt.
If you're happy with your Rey-Rey site, then I understand your statement. But I've found the people who are happy with Rey-Rey or CoBalt sites are happy for two reasons:
1. It is cheap
2. They don't know any better
I will say you've done a much better job with yours than most! I like the colors!