Need a new card for WoW

Howdy all,

Looking for a little bit of help, Basic short story, I like to play WoW and have been able to play all the way through Wotlk. However with the new system requirements my Comp will no longer support WoW Cata. I read the article that was posted on MMO Champion and figured what better place to have someone help me out.

My comp specs are as follows

Model: Dell Inspiron 530

Processor: Intel Pentium Dual CPU E2200 @2.20ghz

Memory: 2.00GB

System 32 bit

Power supply: 300w

Currently right now I have just been using the stock Intel G33/G31 Express Chipset Family. It has worked to some standards, though not great it has done the job until now. I would prefer not buying a new computer
since I just recently bought one for work and would just like to upgrade this one for a reasonable cost. Gaming is fun but it does not need to cost an arm and a leg.

I plan on upgrading the memory to 4GB since it is relativly cheap to do so. However I am looking for a card that is agreeable with my system. Having just 300 watt power supply limits my options. I would really appreciate any advice anyone can give me.

Thanks