You need to be aware that with a GeForce GT430 you won’t get much performance anyway.
The motherboard has a little to do with system performance also I find it a really important part of a system, too often neglected.
If your budget is really tight, then buy an AMD system with a stronger GPU like a Radeon 5770 or even a Radeon 6850 or GeForce 460. That will give you more interesting graphics performance.
The Radeons are cheaper than the nVidia equivalents and you could reinvest the difference on a "sandy bridge " chipset motherboard.
Look on sites like www.tomshardware.com for comparisons between gfx cards
For development work you do need a powerful system which will last you several years. NVidea cards have a great reputation for driver quality and are a pleasure fir developers to work with.