I've always found AR and Monster to be on the same line, in terms of quality and performance. Radioshack being a little bit lower, and companies like Bettercables and DIY builders like BlueJeans and Wicked being a little bit higher.
I think any one would be suitable for a low to mid level HT.
For the coaxial-digital connection, any good video cable will do. These are digital signals and are much less sensitive to the cable than say analog signals. And the people who wrote the interface specification (called SPDIF) had a 75 ohm video cable in mind.
Following the 10% rule, you should only spend a total of $60 on all your cables and interconnects. Use this as a guideline to make sure you dont over-buy.
Good oxygen-free 12 ga speaker wire like the Sound King brand from www.partsexpress.com could put you a bit over if you have really-long runs to the rear speakers, but the bang-for-buck factor cant be beat.
And try to use SVideo at least for the video connection between the DVD player and the TV. It's a big step up from Composite (single RCA cable).
In fact, I don't care if you've spent $6000 or $60000 on your system: AR cables will be just fine and you wouldn't be able to hear a single difference if you buy the silly expensive mega-mega buck cables.