Can't go wrong with any of them really. In my experience though the rugers need about 500 rounds to break in. Before then they only feed CCI with any reliability. After break-in they feed just about any standard .22lr ammo you can get your hands on. I don't know how the 15-22 is out of the box but the word is they are great in the long-term.
I don't collect guns, I accumulate them.