My experience:
I used a pair of Magellan VIIIs in my main system a few years back. I thought they were quite good, but ultimately I wanted more air movement and replaced them with a pair of RBH 1010s. The RBH have more slam and move more air, but are a little slower than the Magellans, and maybe a little more one-notey, but just a little. For me, it was a good trade, though occasionally I regret it. I still use a Magellan in my Home Theater set-up, which may seem counter-intuitive, but movies have so much more deep (and sloppy) bass and the Magellans ameliorate the shortcomings with their tightness and quickness.