If monoprice is just a little bit more, go with them. So many people swear by their stuff, reviews don't get much better.
Monoprice is about 2.5x more expensive, but if the quaulity is higher, it is worth the extra dollars. I just knew that many of the "premium" brands were no better than the wire sold by places like monoprice. I didn't know if the ebay wire was the same quality.