Considering building an HTPC

OK...very new to all of this, been researching it basically the past couple of days. I want to make a server for my main TV and then (maybe) make a client for our bedroom, but that would be in the future.

What I want:
Be able to have all my DVD sets / movies on a computer for easy access
Local Channels (in HD) and be able to record 2 streams at once.
Netflix streaming integrated
MLB.tv (any ideas on this? integrated into MP or not integrated?)
Rip/Play Blu-Ray dvd's

What I like:
Motherboard: Intel Socket 1156/Intel H55/DDR3/A&GbE/ATX
CPU: Intel Core i3 DUAL Core Socket LGA1156
Power Supply: Corsair CMPSU-430CX CX Series 430-watt Power Supply Compatible with Intel Core I7 and Core I5
TV Tuner: Hauppauge 1229 WinTV-HVR-2250 White Box for System Builders Dual Hybrid PCI-E TV Tuner Board
HD: 2x Western Digital 2 TB Caviar Green SATA
Blu-Ray Player: Samsung Blu-Ray Internal SATA Drive with Lightscribe 12x BD-ROM
RAM: Corsair 4GB Dual Channel Corsair DDR3 Memory for Intel Core i5 Processors
Case: SilverStone LC13B-E Aluminum/Steel ATX Media Center/HTPC Case
Remote: Windows 7 Vista XP Media Center MCE PC Remote Control and Infrared Receiver

Basically I'm looking to see if this will do what I need it to do and see if I forgot anything...for instance, do I need a CPU cooler and if so, what would you recommend?

Anything I'm going overboard with? With this stuff I'm at $820 and I still have to buy an antenna. Told my wife I was doing this to save us money and it's getting quite expensive. However, I dont know if I'm able to stop...I dropped True Blood into the TV Series plugin and I'm not sure if I can go without have this awesome system on my TV.

By the way, I am doing this to save money (plus it's awesome!)...going to drop satellite if I can get this up and running.

Thanks so much for any help or feedback you can provide.
-Jeremy