Best Intel processor G1 socket?

I could buy a pretty nice laptop very cheap.

first of all, the processor is not soldered

The processor installed in it is an I7 720QM.

if I have seen correctly the socket is called G1.

is there a better processor for this socket than the 720?

Which one is THE BEST?

With very high probability this processor is soldered… Therefore no chance to change something.

No he is not, otherwise I would not ask the question.