if you want to crossfire in the future, first you need to change your 350 coolermaster power supply. even for a gfx card upgrade, i'd suggest a psu upgrade first. unless your psu is gold rated, which i doubt.
a corsair cx 500 v2
(for single card) and a radeon 6770
. since you claim yourself a non-gamer, you can get an even cheaper and less powerful card like radeon 6570
for crossfire, try something like a corsair tx 750 v2
tv tuner: are you looking for something like these?http://www.theitdepot.com/details-Avermedia+AverTV+Ultra+PCI-E+RDS+%28H777%29_C53P8843.htmlhttp://www.theitdepot.com/details-Avermedia+AVerTV+BoxW7+Lite+%28M097%29_C53P5269.html
these have different resolutions and are different from discreet graphics cards.