I'd stay away from 50/50's, they rock when they work but unless you get lucky there's a lot of work to get them to stay in one piece.
Nukeproof do a few nice pedals. Point one Podiums look the goods but haven't heard anything about them over the long term.
I have some Nukeproofs, had em for ages. Light, strong, thin, grippy.
I have PO1NTs on my DH sled. Thin, light, grippy.
You can add longer pins to anything if more grips needed.
Straightlines are VERY grippy, ive recently purchased a pair (as i sold the V12s with my bike) expensive though and they will wear out your shoes.
Blue MTN Bikes also sell Kowa pedals, much the same as Straitlines, but more pins I think. PM me for Kowas or PO1NTs.
Put Kowa in the search on here, I posted a pic of the pedals a while back.