I love the name jasper it's very cute but Paxton is unique an different so I pick Paxton
My son is called Jaspa :)
Paxton is awesome but Jasper seems to 'fit' better with Phoenix... Not that they have to match though! Good unique names there!
Ryker is awfully close to Ryder. Paxton is OK (it certainly beats the Jayden, Braden, Caden, Hayden and Paydens of the world) but Jasper is a bit more unique. It was popular in Georgian times in England and I think it is a handsome name.