Depends more on the budget. I have a Kurt Kinetic. Nice, but $$.

Here's a good basic one.
http://www.nashbar.com/profile.cfm?c...0and%20Rollers

Go to the Spinervals website and check the videos out. You can look for a better price, but they have a few like Aero Base Builder 5 that take the best couple hours from a bunch of earlier hour long dvds. More bang for the buck, as it were.

http://www.spinervals.com/products/item26.cfm

You, too, can hate Coach Troy.