My keyboard just broke! Well, obviously since I'm still typing this message it's not 100% gone yet. It's just not working consistently anymore. Here's a quick list of keyboards I'm thinking about buying: Logitech K360 ($25-30), Microsoft Sidewinder X4 ($44.40), Logitech G710 ($129), or Razer BlackWidow ($140). First, is there another keyboard anyone uses that I should think about? Second, are the more expensive keyboards (the mechanical ones) actually worth the extra cash? Thanks in advance!