You won't notice the difference between 4x16 watts and 4x22watts to be honest.
I absolutely wouldn't buy jensen!!! And betweend kenwood and clarion, I prefer clarion. My advise: Go listen to those 3 (and maybe some more) HU's and make up your mind. As I said, you won't hear the difference if you go by the figures of that output, BUT the volume and sound may differ between one and the other because of the certain quality of used components.