If I'm going melee sorc, what's going to be more useful: Adrenaline Rush v.s. Carnage, weapon damage v.s. crit damage, more stamina or better health regen?

Yeah it's a good match up. I'm making a melee Sorc and Redguard was a clear choice because of the Brovenant, but with the pre order any faction deal, it is tough.

More Stam more weapon damage, more crit damage more weapon damage.
More resource more damage and utility, more crit chance more damage and heal (surge). More max stamina or healing regeneration? I like the skeleton makeup for Redguard and I also like being a Thundercat.

Most people will say Khajit, but I have to say Red Guard+Medium Armor and you will have tons of stamina.

Well, obviously it would be the Redguard because he's more a warrior so I think be gets a bonus to swords. Not my favorite race so I'm not too sure of that. Khajiit is mainly good for the Nightblade class but the races don't make a big difference when it comes to the classes.