Get the primeknit R1 if you want to go with an NMD for your first boost shoe, but I'd go with an ultra boost pair first.
Ultra Boost has some nice navy colors as well if thats the color you want. I also like the r2, but it seems like like some people don't like them as much. I think it might be due to incorrect sizing . I have really wide feet but do not have problems with the rubber block on the medial side of the shoe. You really can't go wrong with any of them, but the ultra boost is the most popular boost shoe for a reason.