G850 and Phenom II x2 555BE are similarly priced in my location.
which to opt for playing games?
Can i believe G850 is more powerfull than AMD 555BE <as mentioned here
I dont prefer OC as that will add to my budget to go above the stock.
at stock, the g850 is better and you can upgrade to a core i5/i7 or ivy bridge later.
amd 555 be is overclockable (if you oc, add the price of a cooler)... still it's only good if you use it with 990x/990fx chipset mobo with x16+x16 cfx/sli And If you're 100% certain that next amd cpu will never bottleneck the gfx cards.
for non oc + gaming, the pentium g850 is better and more power efficient than phenom.