If you want an O/U or SXSshotgun save your money and buy one later when you have saved up about $1500. Then get yourself a Browning field citori, Ruger red label, etc... You will be much happier and likely save money in the long run. Especially if you ever want to sell the gun.
semi autos are out because I just cannot deal with reaching around the trigger guard to be able to get the safety off in order to geta shot off at a grouse that is usually only visable for a few seconds at best.
As long as you don't mind the shell ejecting in front of your face, the safeties on most semi auto shotguns can simply be reversed so that they operate for a left handed shooter.