Dave, I already bought the "collar" kind and they drive me CRAZY!! I can never get them changed fast enough in my 1 min interval (especially in the 0 min interval!)
I'm pretty sure I'm going to take them back and get a different kind.

Wanda, did you ever get a chance to try out the Probell weights? I'm considering begging my dh for them.
What about the Powerblock set (aren't those the ones you have?) I can't seem to find a price or order form for them on that page. Do you remember how much they were and are you happy with them?