You basically get what you pay for. Good rule for life, and training I supppose too.
I recommend Kreitler rollers. I ride dynolytes, but all of their models are high quality and will last a lifetime. If you figure that the 250.00 you spend will last you twenty years or more, it doesn't seem like that much money. You can also find them used on Ebay occasionally and also in the Roadbikereview.com classifieds (that's where I found mine).
I would stay away from Performance and Minouras. Some guys have had good luck with them, but I know some that have not. I don't know anyone who didn't love their Kreitlers; as much as you can love an instrument of winter torture.
chris
ne iowa