good luck. In my experience here in DH/FR it's either platform or clipless. I use 636's, someone else uses mallets, someone else uses atomic flats. Its all a matter of preference, that is unless mulletsRule… posts then the discussion quality degrades severely.
Personally I would check out the mallets because they have replaceable traction plates and they are a big platform. Maybe you can try them as flats or clipless, just by changing shoes. Or maybe not. I just don't think that their is a happy medium though, you may just have to keep changin' pedals. Try the 646's though if you like the shimano clipless action and feel.
