RE: Which .17 HRM
My brother has a Marlin 22 mag and that is an accurate gun, his friend has a Savage 17 HMR. I think the Marlin is a higher quality gun and walmart has them for about $175. I didnt like the Savage his friend had.
I would get the Ruger before the Marlin or Savage, the action is better and it has a 9 round rotary magazine that is a lot better than the Marlin or Savage. You can also easily interchange the 17 HMR and .22 Mag barrels. It also comes with the Ruger rings and bases like the M77. My 77/22LR will shoot a 1/2" group at 50 yards.
Good luck