I'd definitely want more than a 4X for anything close to 200 yds. Nikon and Leupold are pretty safe bets in the 3X-9X category. You didn't set a budget but I'm guessing you want to stay under $200 or so? Rifleman or Vari-X I would be in that budget range (for starters). Personally, I'd spend a little more and get a Vari-X II