Everyone else has gotten the point across. I'd hardly call that setup SQ. =p
I'd sugguest the Eu700s over the XXX mids, talk to Ology about some of the tests he's made with them. A decent horn driver with an active crossover would fit them together, and you could use a 2 channel amp for the EUs and run the horns of HU power. It's a little more expensive, but I think you've made your point that a bugdet isn't a huge deal.
For bass, didn't you say you were using an seXXX for DD? That's definitely a nice SQ woofer. If you want more, a used XXX will keep similar SQ and more output. Or you could pile on Decware DHM108B (10s) in a wall or really big low tuned box. They have really noteworth SQ and don't need a lot of power to get moving. And better than Adire, they're actually available. =)