I swim/surf/lift big, so I make MONSTER smoothies beyond what those puny Magic Bullets can handle.
I couldn't be happier than with my Hamilton Beach 52277:
[ame="http://www.amazon.com/Hamilton-Beach-52277-Classic-12-Speed/dp/B0013288OY"]Amazon.com: Hamilton Beach 52277 Classic Chrome 12-Speed Blender, Silver: Kitchen & Dining[/ame]
Edit: D'oh, Amazon has em unavailable. Maybe you can find em elsewhere...
You can go spend $350 on a Blender, but this thing has worked amazingly well and I've made probably 300 smoothies with it so far. 1/10 the price.