Looking for a new seatpost -- Ritchey posts???

Anyone have experience with Ritchey seatposts (either the WCS or Pro models)? In particular, can you offer me any reviews of the adjustment mechanism?

I'm looking for a post with the following characteristics:
1) more setback than my Thomson post (prob need around 25mm)
2) easier to adjust than the low-end FSA carbon post I bought at my fitting (which has teeth & grooves rather than being infinitely adjustable like my Thomson)
3) is not super $$$$$$
4) is available in 31.6 diameter
5) is not super heavy. I'm willing to look at both carbon and aluminum, and since I don't want to spend $$$$$ I don't need a 150gm post, but 270 is too heavy...

Thanks for your suggestions!