Ditto on BlueJeans and Monoprice. I especially love the owner (who is a trial attorney) of BlueJeans' scathing response to Monster Cable after they threatened him with litigation. He took them apart with a scalpel! http://www.bluejeanscable.com/legal/...onse041408.pdf
I've purchased the Phillips brand HDMI for around $25 for 6 ft. at Wall-Mart. Hooked it up to my 1080p TV and it works. Don't worry about 1.2, 1.3a, 1.3xyz, especially at a 6ft length. Any competently made 6 ft. cable will pass HDMI 1.3b (or even 1.3xyz!) and really shouldn't cost more than...
Definitely hook up the HD-DVR. This will give you all the benefits of a box - viewing scrambled channels (often the direct cable only has HD local channels unscrambled), viewing guide, DVR, etc. But you could also split off the cable (using a cheap splitter) and hook the cable directly to the TV...
If your sports tickers are getting cut off, try setting your TV to a "Full" or "16:9" setting. This will display the entire 4:3 picture stretched from side to side. You are probably defaulting to some sort of stretch and zoom, which will cut off some of the picture.
Usually Comcast will have to install the first HD box you get. After that, if you want to move up to the newest box or a PVR. they let you pick them up at your local Comcast location. At least in my area, Comcast will supply the cables you need, including audio and component or HDMI, and they...