I live in southern California and I've been testing out the red X50 REV5 for a few days now. I am going to return my red display X50 and buy one for cheaper off ebay. I was wondering if current X50 users prefer the blue or red display. I am thinking about getting a blue one just because it looks cooler but I want to know what you guys think. Also should I be concerned about getting an older unit without the updated REV5 firmware off ebay? Ebay says its brand new so I assume it will have the most current firmware but it still worries me.