Hey Guys, Ive decided to get 15 inch Rota Slipstreams, but i have some questions.

First off I know all about the 15 vs 16 inch debate but im concerened about potholes (I live in NYC) and i really dont want to bend/break a rim which is why i think going with a 15 inch is the better bet. If i do 15 inch i'll do a 50 series tire, if i did 16 id go with a 45 series and i think that might lead to damage if i hit a pot hole fast enough. ( I know you can damage a rim no matter what but you know what i mean)

Question 2. I dont know where is a good reputable place to purchase them from. I emailed rota a while ago and i was told i can get them in the color combo i want (Royal Black w/ Polished Lip) although no one has pics of the set up. I need a good place i can trust. Any Ideas?