Raptor, I would say do both. I made insane progress doing both, 2x5 one day and 3x8 a few days later. If you look at the my journal, right at the beginning is pretty much where I started doing that... I had been stuck at about a ~280lb squat max for a while.
When I started the 2x5 and 3x8 phase I could do 225x8, at the end of the phase a few months later I could do 270x7. I also started taking creatine during that phase but I was upping the weight pretty much every session, and like I said, before that I had been at a plateau for a while.
Check out from the end of my journal on tvs to about the middle of my journal on here.