Thanks everyone for the great advice.
I wanted to thank Bill especially for steering me towards gunbroker.com. I managed to order 5 preban 30 round Colt mags for about $125. I didn't want them to get any rarer even if I were to wait on the actual rifle purchase.
Mostly you all have shown me new companies and websites where I can ogle different guns. However, the easiest way has been to walk into a shop and pick these rifles up and that is what I have been doing. In the process, my wishlist has increased in size.
I want to purchase (pending that I nab this job)
1. R15 or AR variant
2. SA M1A
3. Savage Model 10 Precision Carbine
4. Remington 870
5. SA 1911 Operator
6. HK USP .45
7. HK USP .45 Compact
An expensive wishlist, but i believe the AR will be sooner, rather then later, probably followed by the Shotgun.