Lots of good scopes out there for $500 that will get you out to 1000 and beyond. Don't forget good bases and rings. I'd suggest the Burris Signature Zee rings. They have never failed me and they don't require the lapping other rings need to achieve maximum usefulness. I have used many good scopes from a $99 Vortex Crossfire to Weaver, Bushnell, Leupold, Super Sniper. I have never had one of them fail me. They were all researched for an intended purpose and all have fulfilled expectations and beyond. In your price range I'd suggest the Vortex Vipers. Lot of scoope for the money. Something like a 6.5-20 ought to serve you well.