They are sweet! Maybe some day when my 15" winters are worn, I'll use my 17" OEMs for winter and 18" for summer.
FYI, the XRS wheels have the 5x4.5 bolt pattern, ours is 5x4 (I used to own a Matrix and still frequent their forums)
Here is what a the 16" wheels from my 07 Matrix XR would look like. I just wish they weighed less. They are 8 lbs more with the tire on it than my stock 15" wheel/tire.
Good luck turning those beasts! I had an '09 Venza with the 20's, and it was a drag to turn that thing, even on a highway ramp. It was AWD, so maybe that had something to do with it.
Those 16" wheels look good on the car, but the fender gap is killing it. With those wheels you need to lower the car to close up that gap. Also, there's a little too much meat (sidewall) on those tires for my taste, but that's me. Otherwise, the design/look is nice.
Even some 17"-wheel Prius owners make the same mistake by using 215/50-17 tires instead of 215/45-17 in order to "close" the gap but then the tires look too fat.
