I wouldn't use a Mag Drive. I'm not saying they're bad pumps, but there are much better options out there.
Take a look at the Eheim line. They're not cheap, but I've heard stories of them lasting 15+ years (not exaggerating)..
I'm currently using a Marineland Utility Pump on my tank and it's great. They're cheaper than the Eheims, but they're pretty efficient, quiet, and haven't caused any problems yet. They have a great reputation in terms of reliability, but I can't personally contribute because mine has only been used since January/Feb