What is a decent scope for a 243 win? I only really shoot up to 300 yards. I have been using a bushnell buckhorn, but it doesn't seem very bright in low light compared to my buddies ziess, and it likes to get all foggy when its cold...to the point i would rather not use it at all and run open sights. Don't really want to spend much more then $500. Any ideas? I was looking at the leupold rifleman, anything better? I don't know much about scopes at all...