I run 80lb momoi hi-catch on my 50 wides. Alot of people like the diamond - we run it on our 130's - but imho I don't think the diamond has that much advantage over the standard to justify the increase in cost.
Momoi is what most of the guys I know out here use. I have it on my 50w's. I was thinking of loading it with braid this year and having a topshot of mono. I think there are guys on this board that fish with this setup and like it.