After a lot of research of osCommerce vs. Yahoo vs. Joomla vs. volusion vs. anything else on the market, we have found that Americommerce is the best website management tool and top of the industry for SEO. Yes, it's a bit pricy but it will put you ahead of your competitors. Plus, their customer service is as good as any. They will even design and program a whole site for you for a reasonable price.

I have watched all their videos, interviewed existing users, and signed up for the demo and I like everything I see. Even if I have something that needs to be customized, they will do it for me. Probably the biggest benefit is that I can use the same "warehouse" for as many websites as I want. And since I already have a few sites and am currently developing a couple more, this was the feature that attracted us the most.

My 2 cents.