Help me buy some new cables....

Okay, I am looking to buy some cables on eBay--I am hoping to take advantage of some clearance items. I use an all Magnepan HT driven by Citation 7.1 and 5.1 amps. My processor is a Lexicon MC-12 (don't know how much that matters). I am thinking of buying one set of a couple to try them out and then buy more if there is one I like, but frankly, I am not a big cable experimenter and with two newborns I just don't have the time or money to do much right now.... So any way I can cut a corner and get a good sound the happier I will be. Anyway, there are a few choices that I've got:

Straight wire Musicable II
Vampire Wire
Monster Cable of a few types (300i and 350i I think, plus a couple others)
DH Labs White Lightening
Audio quest g-snake
knuconceptz
Tributaries (their lower end cables of course)

I could also DIY some cables, but time becomes a REAl issue. Also, while I have no doubt I can make a functional cable, I've never actually made interconnects before so I am worried about the end quality even if I found the time to do it.

I'm also open to suggestions. As you might guess, I am not looking to spend very much here. My budget basically maxes out at $50 per pair. I'm considering doing one very nice pair for the front speakers and perhaps center channel and lower end cables for the surrounds.

Thanks for any advice!
Aaron