^^^^
5.1-5.2 ideal with regard to what goals? As I said, I'm looking to balance all considerations, and some, such as flavor, body and mouthfeel, foam, wort clarity, and so on MAY favor a higher pH. (FWIW I've always aimed for 5.2-5.3, but am thinking up to 5.5 might be more acceptable, and as high as 5.6 not outside the realm of reason.)