1 no a micro atx motherboard will go into a atx case , but a atx motherboard will not fit into a micro atx case . a micro atx motherboard will fit most cases out there .
2 amd recomends a power supply that is dual fan , one fan on the bottom of the supply , fan is positioned right over the cpu , and one on the back . you will want a ps that puts out atleast 15a on the 12v rail .
i posted a case in the deals section that is only 25$ shipped it is a nice deal . the ps that is in there is alittle underpowered so i would get a different power supply . a good budget power supply is this
Achieve 500w for 23$ shipped . i use this one myself and like them alot .