Are you sure those tires are good? On Tirerack, the Potenza RE92 has a bad "Would Buy Again" rating (2.4 out of 10) based on 1,960 survey responses. Also, the traction on snow/ice ratings look kinda crappy... 2.9 to 3.8 out of 10.
I wonder if those are any better/worse than my stock tires...