modestly priced gaming mouse, love mine
Seems like the mouse I am using is not as good as I thought it would be?
Anker 8200 DPI High Precision Programmable Laser Gaming Mouse for PC, 9 Programmable Buttons, Weight Tuning Cartridges, Omron Micro
http://www.amazon.com/gp/product/B00AAQRNQ8?psc=1&redirect=true&ref_=oh_aui_search_detailpage
You can install windows 8, i would get windows seven but thats just personal prefrence. Yes you can install via usb microsoft even has a tool on their website to make a bootable flash drive. No you should give a shit about your mobo being 3.0 compatible most graphics cards are only 2.0. And down the line 3.0 will still work in a 2.0 slot with negligable performance loss. I use an anker gaming mouse http://www.amazon.com/Precision-Programmable-Buttons-Cartridges-Switches/dp/B00AAQRNQ8 my keyboard i wont list because if your not getting a mechanical keyboard you might as well just use any old keyboard that feels decent.
That case just looks like your average budget case, i cant speak about it too specifically the pictures dont even show the inside, if it has nice cable managment or not etc. But the cooling looks ok, but i cant really tell if it is or not. Usually theres a fan on the top and upper rear but it states three fans and those two coming in the side are usually where you would put fans once you expand if you decided you needed more fans.
So im definitely iffy on the case, you may look into a high end case because its something you can take with you down the road for future builds. I use an arc midi r2 and its great but a little pricy if you dont catch it on sale. Fractal design, lian li, make great cases. Most cooler master cases are pretty sweet too you may look into those for a budget case.