You can save a lot of money on the TV tuner and the case
Who really wants to spend $200 on a case? Unless you are going to have people staring at it frequently it's probably a waste. I would get a much cheaper case and get myself a 3rd party fan controller.
$150 for a TV tuner is too much IMO. The differences I've noticed between a $45 LifeView 3000 and a $150 card are minimal at best. Is there any specific reason you chose that card?
PSU is a bit much. Sure, you do have a beefy video card, but I have nearly the same processor and much more other hardware in my primary system using an Antec SmartBlue 350W powering it. 3400+ with ten (10) hard drives, Pioneer DVR-108, tv tuner, 9800 pro, TTV9, two raid controllers, etc. For you I would suggest going for an Enlight/Antec/Sparkle/etc in the 450-500W range, mostly for the video card, but there's no need to plunk down $240. You can do just as good for $150 or less.