Personally, I use Stinger Expert for RCA, Monster for Optical and Stinger Custom Pro for the rest.

This will open a can of worms, but I say buy a cable with quality build (i.e. good connectors, twisted design) and buy something that looks good and fits your budget.

People will say buy shielded, don't buy shielded, cables make a huge difference, cables make no difference, etc....

I'm guessing that regardless of all of these opinions, you will see that many manufacturers offer cables at different price points. Find a reputable manufacturer and go with what you feel comfortable with. I'd feel confident in saying that it will suit your needs just fine.