Hp Pavilion A420N motherboard upgrade

If you are going to spend all that money, why not get a modern, future-proof setup where you can use your same case, DVD, PSU (such as it is...) and fans? (You'll need new SATA HD, and OS too though $40+$100)

http://www.newegg.com/Product/Product.aspx?Item=N82E168...
BIOSTAR H61MH LGA 1155 Intel H61 HDMI Micro ATX Intel Motherboard $70

http://www.newegg.com/Product/Product.aspx?Item=N82E168...
Intel Core i3-2100 Sandy Bridge 3.1GHz $125

http://www.newegg.com/Product/Product.aspx?Item=N82E168...
WINTEC AMPX 4GB (2 x 2GB) 240-Pin DDR3 SDRAM DDR3 1333 RAM $43

make sure you check your specs Iam learning the hard way with my pavillion make sure to measure your motherboard everything in an h.p. is made to fit measure your mother board then get the specs for the new motheboard and especially your p.s.u. h.p.'s are great but they dont have alot of extra free space everything in them is made to fit just check your mesurements your self