I believe these guyz make good "first" guns
http://www.stoegerindustries.com/
Old SxS's (ie: Parker, Fox, Ithaca, L.C. Smith etc.) can cost a lot of money and would not be my first choice for a novice hunter.
Try to find a Marlin LC Smith, CZ, Ruger Gold Label, Franchi, etc. - anyone will serve you well !
http://www.marlinfirearms.com/artwor...mith_20-db.jpg
http://www.cz-usa.com/products/view/...case-hardened/
http://www.gunsamerica.com/933288384..._label_SxS.htm
http://www.gunsamerica.com/970274552..._20_GA_SXS.htm