Make sure you buy all the choke tubes, try to get a good deal, once you have paid for the gun, ask the dealer if he/she can throw in a free box of shells, works allmost all the time.
If they have an range, take advantage, make it clear that you want to buy, have them give you a gun to try, go through about half a box of shells and say you would like to try another. Why? Have a great day shooting guns for free and you will also have a better feel for what you want.