For me, luxury car ownership has always been a two-step experience. I like to pay a fair price (that includes allowing the dealer to make reasonable profit and not coming off as a total dbag who squeezes every penny). The key word here being "reasonable", so doing homework is essential. On an LR, total front end markup being around $5k, $2500-3000 off the sticker as a "courtesy" discount is reasonable in my book. If the dealer obliges, it is then an easy deal for them, no hassle. In return for an easy, painless retail transaction, I do expect exemplary service afterwards. That includes loaners and fair prices on parts and non-warranty items. If the dealer fails to provide good service, this relationship immediately turns sour and the price for them is hell to pay (customer satisfaction surveys, contact with the GM etc)
In the last 5 years I purchased 3 cars from the same dealership (the last one being an LR4). So far, this arrangement seems to work well