Yep. Looking good!
Like I said, your only worry is whether or not your current PSU will be enough to power that new card.
I'd say a MINIMUM of a 380w psu (anything less and your system may become unstable), but recommend you get a 450w. But most importantly, make sure you have at least 24amps on your 12v rail. You can find all this info on the sticker of your power supply (inside the case).
If you find you'll need a new PSU, look at companies like Antec or Enermax. Very reliable PSUs.