Planet13 - 8:00 pm on Jan 20, 2012 (gmt 0)

This being the case, I would consider them to be "generic" in that you can purchase from many other online retailers, although our price and service are very competitive. Does that change the equation for anyone?

Yes, I think that you should be building up YOUR brand, and YOUR brand is based on your competitive prices and services.

And the best way to build up your brand would be all on one domain.

And if your prices and service are better than the others, let EVERYONE know about it. If you have a competitive advantage, then by all means, flaunt it.