I've used an Agir Niord 44, an Agir Niord 40, a DSS CCR wing and a Light Monkey 38lb STW. All worked very well. The wing I've held onto is the DSS wing as people have offered me good money for the others and the DSS one is hardest for me to replace.
I've tried some larger. (50lb+) horseshoe style wings and they didn't work so well, ditto the larger donuts. Bad trim, poor kidney dump access, crappy gas migration on ascend and generally less comfortable dives. Diving a Drysuit on CCR I find you generally don't much from your wing so I've never needed anything more than 38lb lift even with bailout on the surface in reasonable chop waiting for the boat to pick my ass up.