i have my setup listed below...well i have an e6400 OC to 3.6ghz at the moment...and i was thinking of getting a q6600 my friend is selling to me for $160...is it worth upgrading my e6400 OC for the q6600? im confuse if i should get it or stick with what i have.....and 2nd if i get the q6600 would there big difference in speed?