FWIW I’m shooting with a Nikon D7100 which would be in the same price range as the Pentax K3 II and would be a definite upgrade over the Nikon D5500. I have no experience with the Pentax so I can’t offer any opinion based on personal comparison but I can say that the D7100 is a great camera that may be worth considering. Although it has been replaced by the new D7200, it is still available new. I purchased mine refurbished by Nikon for around $600.
