As much as I love my Galaxy SII, currently running with CM10 rom, I really hanker after a change. CM does a great job of making the GSII a much nicer phone, but by not having the open sources it doesn't work anywhere near as well as it could. Therefore I'm pretty much decided that I need to make a move to a stock android device, where the updates are swift and plentiful.
However there are a couple of thorns in the side of my plan:
1) I understand why Nexus devices don't have SD card slots ... but really wish it could have had more than 16GB.
2) I really love the form factor of the Galaxy Note II !!!
But, as I'll be buying outright, and then selling the Galaxy S II, I think I'll end up with Nexus!