There are many wheel choices and since it is a very personal style statement when installed on your car I will leave that to you. As far as, size ... either 8.0 or 8.5 will work with the 225 width you mentioned just stay away from 9.0" or offsets higher than 42mm. On
www.tirerack.com all of the wheels pictured will fit your car properly without any problems.
Tire size is the second issue .... I would suggest that you use the same size on all four corners because it will make the car more neutral handling in corners. The reason the wider tires are used is to reduce throttle induced oversteer and create some understeer, both things are to aid unskilled drivers and the wider rear tires look cool . Plus you will get better tire life when you can rotate your tires.
Tires... I would suggest that you take a serious look at the S-03 Pole Positions they are not that expensive when compared to other tires in the same performance catagory.
hope this helps in your decision ... if you have any additional question please feel free to give me a call