Shop for the floor plan you like and you think will work for your needs. Its standard practice that you will get 25% to 30% off MSRP any day you walk into a dealer. Know what you want for options, all models are not set up alike. Some dealers are better than other. Some have better reputations for customer service and their service depts. Some are to be avoided.
Don't be afraid to deal hard and ask for better tires to be put on (if they are cheapie Trailer Kings or other low end tires) before you purchase, make it part of the deal. If you will need a hitch do some homework on those too. Know what the price ranges are. You have a great resource here and lots of experience willing to help you out.