I do not think i am going to lower the car...I live in utah and the roads suck as it is now.
The rotation on the wheels is perfect...
I do not know how much the wheels weigh a piece, they are pretty heavy though.
The different tires were to save money...As long as the have to same pattern and tread, you would be fine with different tires...they are both ZR rated.

sorry for the short dumb answers...I am just really busy.