Pick one up Huck. You can find used guns at a very fair price. This is my second HMR. I bought the heavy barreled gun originally. I quickly learned that the varmint barrel is really not needed for a 125 yard groundhog gun, so I sold it and bought the sporting barreled gun. I feel 125 is about max range for good clean kills with the 17 grain bullets on groundhog sized game. 20 grain bullets may perform a little better, but I'm thinking not that much. If you would want to hunt ground squirrels or prairie dogs out west the heavy barrel may be a plus.
I'm torn between my HMR and my .22Mag. The .22Mag with 30 grain ballistic tips is quite potent and the trajectory is not that much different than the HMR out to 150 yards. Both are fun little rifles to shoot.