Looking for a Low budget graphic card. Need suggestions. NOOB here!

Hello,
I want to buy a graphics card for playing games. My PC config is

M/Board: asus.com/Motherboards/P5G41CM_LX/
CPU: Intel DualCore 2GHz 32bit
RAM: 2GB DDR2
SMPS: 450Watts
OS: Windows XP (32bit)

These are the following cards I am thinking of buying. I want to buy the best one among them, you can also suggest some other cards in the budget too.

1. ASUS 2GB GT610 heatsink only
ebay.in/itm/ASUS-Nvidia-GeForce-GT610-2GB-DDR3-PCI-E-Graphic-Card-HDMI-DVI-VGA-GT-610-/201025253770?pt=IN_Speakers_Webcams_Multimedia&hash=item2ece09f18a

2. XFX RADEON 5450 1GB GRAPHICS CARD
ebay.in/itm/XFX-5450-1GB-GRAPHICS-CARD-/121266491159?pt=IN_Computer_Components&hash=item1c3c0bcf17

3. ZOTAC NVIDIA GeForce GT 610 Synergy Edition 2 GB DDR3 Graphics Card
flipkart.com/zotac-nvidia-geforce-gt-610-synergy-2-gb-ddr3-graphics-card/p/itmdv9zb9gpqn2ja?pid=GRCDBM6PDGC9QJEZ&start=2875&otracker=nf_price_wishlist&

4. Forsa NVIDIA GT610 2 GB DDR3 Graphics Card
flipkart.com/forsa-nvidia-gt610-2-gb-ddr3-graphics-card/p/itmdb7pm9t8jqzwy?pid=GRCDB7PM9T8JQZWY&otracker=from-search&srno=t_9&query=graphics+card&ref=001c3191-50e6-461e-8550-b1af0f04a336

5. Gainward NVIDIA 2GB DDR3 GT610 2 GB DDR3 Graphics Card
flipkart.com/gainward-nvidia-2gb-ddr3-gt610-2-gb-graphics-card/p/itmddrzzcygk7hzf?pid=GRCDDRZZCYGK7HZF&otracker=from-search&srno=t_1&query=graphics+card&ref=001c3191-50e6-461e-8550-b1af0f04a336

I have very little / no idea about graphics cards. Will any of these graphic cards be supported in my PC? Which is better, nVidia or ATI? Kindly suggest any other good card in the budget, if any.
Thanking you in anticipation.

The best one according to me is Gainward NVIDIA 2GB DDR3 GT610 2 GB DDR3 Graphics Card. The specification does not matter, it is also important how better it can work. I had checked all your models and among all Gainward NVIDIA 2GB DDR3 is good. It can give you option to play games at max resolution. Don't go with 1GB. The price of all this cards are almost in one range.

Thank you Dixir-R
:)