You both have good points, though I honestly prefer Sloan to Caine. But I'm just weird like that.
I've never played against Ret so I can't give an opinion on them, but I can say that saying Cygnar has a very good ranged game is an understatement. I've killed Casters within the first few turns with a Hunter under Sloan's Feat and Snipe. Love the little combo. And if it's been Boosted... How do I make a maniacal grin again?