Building pc for my special needs kids ( price update)

APPROXIMATE PURCHASE DATE: 2 weeks

SYSTEM USAGE FROM MOST TO LEAST IMPORTANT: multitasking, software
PREFERRED WEBSITE(S) FOR PARTS: newegg.com, micro center, tiger direct

PARTS PREFERENCES: what ever makes it fast and responsive

OVERCLOCKING: Yes SLI OR CROSSFIRE: no

*price update $800-900

just want a really fast and reliable pc guys really responsive as it is a classroom pc for my differently abled students . some of them has short attention spans so i need a really fast pc willing to budge or even pay extra for ssd

APPROXIMATE PURCHASE DATE: 2 weeks BUDGET RANGE: 800 - 900

SYSTEM USAGE FROM MOST TO LEAST IMPORTANT: learning programs for kids lots of amps, multimedia presentations

PARTS NOT REQUIRED: keyboard, mouse, speakers

PREFERRED WEBSITE(S) FOR PARTS: any ( live close to micro center )

OVERCLOCKING:no

MONITOR RESOLUTION: dual 1440 *900

ADDITIONAL COMMENTS: just want a really fast and reliable PC guys really responsive as it is a classroom pc for my differently abled students . some of them hahave short attention spans so i need a really fast PC willing to budge or even pay extra for ssd

cpu:amd thuban 6core!
mobo:asrock 770chipset
gpu:ati 5750
psu:antec earthwatts 500watts
case/dvd:rosewill destroyer and cheap dvd drive
ram:gskill ripjaws 4gb
hdd:samsung f3 1tb

total:$693.93

i dont really know microcenter. im from phil so. ask other's but they say you can get a pretty good deal there

a windows 7 64bitfor $100??

uhm, keyboard?mouse?speakers?
speaker
keyboard
mouse

keyboard,mouse,speaker TOTAL:$56.06

if all total(with os):$849.98