Nice looking brew there, man. Well done. With regards to head retention, try adding some flaked grain such as flaked millet. I have just done an American Amber with a hand full of I untoasted oats. It's only been in the keg two days, but the wee sample I pulled off had a whooping head on it and stayed. So I am thinking if it had been bottled, it would have been even better once poured. You can also try different candi syrups for colouring, too. Other that advice, all looks good.