You came here asking for advice but seem to be planning to "walk your own path" anyway, so what's he point?
Why would you waste your money on a 300W power supply? You'd have to upgrade it again if you wanted to install a REAL gaming card someday.
I provided links to a 430W PSU for $20 & decent gaming card for $45. Sure, those prices are after rebate, but if you think you can do better than $65, have at it. I doubt you'll find a GT 440 for $65, plus you'll still need a new PSU to be able to run it.
I realize there are NVIDIA fanboys & AMD/ATI fanboys, but sometimes you have to jump ship & get the best product in a certain price range, even if it "goes against your grain". From a price/performance standpoint, AMD/ATI dominates the lower end. If you want to pay more for an inferior card just because it's based on an NVIDIA chip, knock yourself out.
BTW, if you're not from the US or are unable to make online purchases, please say so - I don't want to waste my time posting links to deals if you can't or won't take advantage of them.
video cards at Newegg, priced low to high
Maybe this article will help:
Best Graphics Cards For The Money: April 2011
Here's another one:
Don't Be Surprised When Your Cheap PSU Blows Up