All of my sheets and halyards are 7/16" just for the hand comfort. 1/2" seems a bit overboard, 3/8" a bit small for the hand. Vang and outhaul are 3/8", furler is cored 3/8" (That is core only on the portion that rolls up un the furler.Reefing lines are a bit smaller, 5/16 I think. Lengths you're on your own, although I think my halyards are 110' coming back to the cockpit.
My main halyard is Sta-set X and I wouldn't bother with it again. Regular Sta-Set is just fine on all the others. Main sheet is Regatta. Nice feel and won't hockle, but doesn't come off the self tailer perfectly, but it never bothered me. Jib sheets are some sort of fuzzy covered stuff, I think Samson, again nice feel.