When looking at sites that are well done, visually and from the perspective of obtaining new customers I came across DirectTV. Their site is an excellent example of a site focused on customer acquisition. Obviously a good service at a great price is important, however being able to convert a visitor into a customer with the proper messaging to get your offer across is an art form and Direct TV did it right.
Recently I came across the Direct TV site when I moved, purchased Direct TV and am very happy. I got two DVRs and hooked up the system to five TVs in the house.
Their Direct Satellite TV offer includes free DVR or HD upgrade, local channels are free and installation free. They have also decreased their monthly fees by $18 a month for 12 months and for three months you get HBO, Showtime and Starz. All of these offer points are front and center grabbing the attention of the visitor and I am guessing (as they convinced me) that their customer acquisition and conversion is very high.
This is a great site to use as an example when creating niche sites of your own to promote affiliate programs. Of course if you are in the market as I was for Directv Satellite take a look at their offers.