My two cents on case and psu. I use the cheapest items i can find. If you are not doing anything that generates a lot of heat or stress they will be fine. The b75 motherboard will have sleep working if the machine is done properly so skip the ssd and get any cheap hard drive. In fact get 2 hard drives and save the second to make a clone of the first for a backup when it comes to mountain lion update time. The I3 is overkill on a cheap machine, the celeron and pentiums are more than enough if you can find a cheap video card to go with them. 8600 gt, gts, 8800gt, gt240, etc can be found for 20-30 bucks or so.