In reply to joef: I used a set of the CT carved chocks the other week, borrowed from a buddy who swears by CT. I was climbing on Limestone sea cliffs and had no problems with them at all, in fact I quite liked them.
If you're looking to spend less than £60 your choice is basically between CT chocks, WC classics or Zero G spectrums.
The CTs and Zero Gs are anodised but that's the only real difference between the three, especially if you're new to placing gear and not set in your ways about what you like and don't like.
No matter what you choose practice placing them before hitting the routes, and enjoy your climbing.