These are questions you should have asked before hand.
Ok I have no clue what some of these people are talking about, but they are HDTV nubs.
Triple LNB Dish only requires one Coaxial cable from the dish to your receiver.
Samsung SIR-TS160 is the best receiver out there right now. It has the ability to display 480i/p and 1080i at the same time, no other unit does this. This is the unit i got the day before the superbowl...I love it. I did a lot of research. Be sure to get the latest unit and update to the 1.0.0.6 firmware. The box should automatically download the firmware upgrade. It has great OTA (Over the air) tuner built in also.
There is NO way around the 3 LNB dish if you want HDTV. Chalk it up in the name of Technology. You have to consider that a $120 dish will last you many years. But that $200 video card is outdated in 6 months. It's worth it in the long run.
To be perfectly honest, there are ways to get a Triple LNB dish from DTV for $14.99. Go read on some of the HomeTheater forums. I got my dish and 3 receivers installed, all wiring and everything, paid by direct tv, for $14.99. I had to comit to 1 year of Showtime (which i needed anyway for HDTV) and 1 year of total choice, which i already get. So it was a no brainer. You just have to know how to talk to them. They are getting big money out of you for signing up for those things, so dont feel bad about making them install a dish and give you one for free...i sure as hell know i didnt.