I don't think the basic premise of the interface is very helpful. Having to dial in an exact configuration to get any information is very cumbersome, and requires the user to scan the parameters and take notes to get an idea of what the tradeoffs are.
In particular, the way service providers disappear from the results when a configuration they don't support is entered creates more questions than answers to the user. When I enter a few configurations with no result for Rackspace, I think "why don't you just TELL ME what Rackspace supports."
I know you have many dimensions of data to deal with, so a more complex visualization is difficult, but it will be worth it if you can work it out. I would recommend looking at Edward Tufte's books.
You may also find Tableau software's free web visualization software useful. It solves this basic problem although I have never used it so I can't say if it works well.