My '08 SXT AWD came with chunky, 5-spoke 18" rims, stock. I would think that they would fit on the 2nd gen, so long as the rotors and calipers clear. If you've got some space between the brakes and the inside of your 19s, then you should be able to go to an 18" rim without a problem. Offset is going to be your main concern. Also, if you can get 18s to work, you can throw some 225/60R18 tires on for pretty cheap, compared to the cost of most 19s...