Yo i want to run borderlands on my PC

[strongbad]

According to: http://www.systemrequirementslab.com
I need a better graphics card. I currently have a Nvidia Geforce 7100 that came with my computer. I'm not trying to spend more than $50 on a graphics card, so is there any that i could buy that would run borderlands at decent settings? If not I'll wait until i get my laptop. Here's my current specs:
CPU: Pentium(R) Dual-Core CPU E5200 @ 2.50GHz
RAM: 3.7 GB

[?????]

Knock yourself out: http://www.newegg.com/Product/ProductList.aspx?Submit=ENE&N=2010380048%204025&name=%2425%20-%20%2450

Here is GeForce 9: http://www.newegg.com/Product/ProductList.aspx?Submit=ENE&N=2010380048%201305520548%20106792522&name=GeForce%209%20series

Don't like nVidia or just prefer ATI? Here are r8xx (or hd5k) http://www.newegg.com/Product/ProductList.aspx?Submit=ENE&N=2010380048%201305520549%20106793261&name=Radeon%20HD%205000%20series

[strongbad]

Thank you!
I'm getting my laptop in like a week though so i'll just wait lol