Newegg.com has a gigabyte g41 board with e5200 retail boxed cpu for $124.95 that would give you a better cpu and board. Any micro atx board should fit your sony case. The newegg combo deal is under "cpus and motherboards" subsection under cpus.
hi, i'm having the same trouble with my sony vaio vgc rb-52. if i purchase a replacement motherboard, and swap the processor and all other components, will my existing installation of windows xp work with the new motherboard?