I have the Time Atac Z and the 661 combo from pricepoint myself. I really like it a bunch. This is my first clipless system, and I give it big thumbs up. I find it easy to click in, and to escape, also.
ATAC Z's, the shiny black version is a tad slick if you;re wearing regular shoes or riding without being clipped in. I would have liked more teeth on it. But otherwise I am really pleased with them.
Mallet's were another one I was eyeing also.. They both seem good, and seems like a lot of people compare mallets and ATAC Z's and they all love what they have.