I did this project on a computer that my school gave us as part of the tuition. So after I changed out the processor on my laptop others followed suit. There have been about 8 or 9 people that I know of that have done the same thing since, and have used various icore moble processors in the i3 and i5 family.
I noticed that there was an i7 mobile processor that fits the socket, however, I have not tried that one because it was $300. Just note the i7 mobile processors that are quad core, do not have a graphics chip on them so if you don't have a dedicated video card, they will not work. The two core i7 processors will work however.
Good luck.