will adding a tv turner + graphics? Will it use up the power supply? I just saw another question and never thought of the power supply i am looking to add a tv tuner and graphic card and more 2 gb ram which would be the best thing to get here is the tv turner
http://www.futureshop.ca/catalog/proddetail.asp?logon=&langid=EN&sku_id=0665000FS10 101200&catid=&test_cookie=1

What graphic card would be best?
I could upgrade my power supply- will adding all this overload it?