Only abot 70$ Budget, I was looking at cards like Gt 520/620 Only about 30w consumption.
I want to get other peoples opinions on it though.
Black Mid-tower ATX chassis
Microsoft Windows 7 Home Premium 64-bit pre-installed w/CoA
AMD Phenom II X2 521 3.5 GHz dual-core processor
AMD 785G chipset
4 GB DDR3 RAM
1 TB Serial ATA hard drive
DVD±RW DL Serial ATA Drive w/LightScribe
Integrated ATI Radeon 4200 graphics processing unit (GPU)
Integrated Realtek ALC888S-VD audio
Integrated Realtek RTL8105E 10/100 Fast Ethernet LAN
Built-in Digital Media Reader (15-in-1)
250W ATX power supply
USB keyboard & mouse included
The radeon HD 6670 or radeon hd 6570 will serve you well for $70 with your PSU. I have a 250 watt PSU right now too and I am running the radeon hd 4670, so you'll be fine too since the radeon hd 4670 consumes more power.