Hey, those look like my drivers....
Try a bigger cabinet with a port with the Seas. The port might be a bitch to make because of lack of space. That will open up the Seas a bit - give it some and dynamics, even in the mids. The Seas are extremely inefficient once baffle step is considered, so it will never be a super dynamic and lively sounding driver.
Another consideration if you don't play super loud... drop the x-over of down to 1600Hz. Those Scanspeak tweeters will handle it. They are very slightly horn loaded after all. Those are one of the best tweeters I've ever heard.