Hi,
I didn't play 1 dealer off another when I purchased my LR4. I only have 1 dealer within 200 miles anyway.
Here is what I did do: I found another vehicle that would have fit the bill for our needs. I actually had two, GL550 and the GX460. I really wanted the LR4, but I knew what I was willing to spend on it, and I had already collected my best deals on the other trucks. When I went to the dealer, I basically said, I really like your truck and it would fit great for our family and life style, but so would these other trucks. Here are the deals I have for them; I had a folder with all the quotes from dealers I had collected in person.
It accomplished a few things for me. The dealership knew I was serious and that I was really in the market. I had all my ducks in a row and knew what my trade in was worth, along with quotes from the other dealers on my trade in. With options that I was willing to take other than the LR4, it eased my mind that I had viable alternatives if I couldn't make a deal on the LR4.
In the end, from the time I het the LR dealer to the time I had commited to our deal was less then 3 hours. That was with a test drive of the LR4, a test drive of my trade in with the dealership, a tour and some chit chat.
Having all your facts, numbers, and frame of mind going in will certainly help you.
Rob