New? Ritchey.
Why limit yourself to new? At my local Co-op we have a bin of LOOK ARC-compatible pedals, that includes almost new items such as: Carbo Pro, PP166, 176, 186, 196, MP90, PP396, etc.
I use the best LOOK compatible pedals of all time: Dura-Ace from the early 90s. It appears that the pedal bodies were made by LOOK, with Shimano innards. I have serviced these, and bottom lines is that these feature the best bearings I've ever seen on any pedal.
In use, bombproof, except that I've seen these pedals with broken release springs. Springs are replaceable. If you buy these pedals used, make sure to check them out in person.