not sure about tristar, seems a little cheap to me but it might be a good working gun. If you are considering an over and under instead of a side by side, CZ makes a good-looking and inexpensive over-and-under called the mallard. It goes for $515 on gunsatcost.com. Here's the link:

http://www.gunsatcost.com/item/33470_CZ_Rifles_Shotguns_CZ_06091_Mallard_Shotgun_ .aspx