Monster's new "Ultra HD Platinum" HDMI range is being billed as an essential purchase for anyone requiring the high-speed bandwidth demands of 4K video. On the downside, a single cable can set you back as much as $349. Is there any way this eye-watering markup could possibly be worth the money? Or will a $5 cable off eBay serve you just as well? Yesterday, Monster put its money where its mouth is in a live HDMI bit error face-off. Here are the results.