Those are magnificent speakers and will sound great with Sensation.
I've heard that Q-Acoustic is nice. In Europe you can probably pick up the Tannoy 601p. For under $250 new it's very hard to beat.
For a bit more money ($350) and less bass, check out Music Hall Marimba.
While you're at it though, look for some book-shelfs with ribbons. This type of speaker represents the future. You just can't get the electric high-end without AMTs and a really, really fast woofer.http://www.whathifi.com/review/bs-142
Golden Ear, Emotiva and others are doing it. My friend David Fabrikant is going there with the Sierra-2. http://www.ascendacoustics.com/pages/products/speakers/SRM2/srm2.html
To go the other way, try the Cambridge Audio Aero. Very smooth full-range highs with low cross-over. It's basically a point-source speaker. But you won't get that rip your hair out rush you get with the ribbons.