Thanks for the heads up kimmy - I did know there were three colours and I knew when I got these with the red cleats that they had the most float but for $10 and the desire to "just see if I liked them on my feet" it was a place to start. REI only carries the red ones and the black ones and since I hate having float, my plan was to buy the black ones if I liked them! Which so far I do!
I have Specialized shoes and since I just put them on last night I can't tell you about coming unscrewed! but it's a good thing for me to keep in mind. Thanks for mentioning that.

Once again this board rocks! I knew I could get all my answers right here! thanks everyone for all your help/answers/suggestion! Time to go play some more with my new-to-me pedals!