I would like to convert a low end pc of mine to a nice HTPC/DVR. I have a A10 6400k, 64gb ssd, a motherboard, a case and a power supply. I was wondering how much of what RAM I should buy. What PCI-E based tv tuner I should buy. Also how much storage do I need. Lastly what OS should I use. My budget is 100-150$ (cheaper is better).