Hey there and thanks for your time,
I'm planning to develop for iPhone and I never owned a Mac. I don't want to invest ~$1000 in this(getting a mac, software,etc) yet. So I decided giving OSx86 a try. I got 2 PCs here. The first one is:

CPU: AMD Athlon 64 x2 4200+ (SSE3 probably)
MB: Asus M2N-E
RAM: 2x512 DDR2 dual-channel
Graphics: GeForce 7200
IDE Hard disk and dvd-r device.

And the 2nd one is intel core2 duo(SSE2, with a lower clock and cache than the AMD) based on a P5G-MX Asus board with onboard graphics.
I don't care about graphics or networking much.
Any suggestions/guidelines on where to start from and if it's a good decision or not?

Thanks again, for your time,
Parsa