Fill the new build form in new build section .
about processor : nice choice [ cheapest of ivy bridge ]
motherboard : its OK but you should go with at least H77 chip-set motherboard , i personally don't want B75 chip-set i think it wont charge you that much .
B75 is no good for SSD , if you are planning to get SSD go with H77 [ serious suggestion ]
RAM: go with G.skill or corsair [ always best choice ]