I don't recall seeing any City of Portland Chargers, mostly Crown Vics and a few Chevys. The Clackamas County police and state of Oregon drive a lot of Chargers. Also there is a blue Mustang GT unmarked that I see fairly often on I-205. You would never know it was police until the lights come on.
I haven't see the new Chargers out and about I know they have the 2010 ones in the white colors, Beaverton though is in the process of transitioning out their crown vics for an all charger fleet
Brampton, Ontario, where the Chargers being manufactured, there are many police Chargers. Looks like SXT, at least no R/T badges, white colour, black matte grill surround, police black wheels.