With the idea of being able to rotate all four wheels, if so how was ride, look, and handling affected?

I've done it with the OEM 19's before. You won't notice a difference.

i had an 04 with 20x8.5 all around and handling definetly suffered big time. But maybe at the same time it's a big difference because my 06 has RAS. Wish i could give you a less biased opinion but hey guess it's better than nothing but it is nice to be able to rotate tires.........

How did you do it with the stock 19's they are staggered as well................

By thinking outside of the box....

The rear wheels are only 0.5" wider and weigh 2 more pounds, I doubt the offset is noticeably different as well. Practically the same as the fronts when running equally sized tires.

oem 18s ARE the same size and offset. the only difference is the fronts are drilled out so the bolt that is originally on the rotor will fit. take the 12mm bolts out, put same size tires on and GOOOO. the 19s are staggered obviously, you can see the diff if you run same size tires but it wont be a huge diff....not what i would do tho.

i always thought the OEM 18's were staggered but recently found out they're not. I don't know why it's not since even the oem 17's on the 350z are.