Hi,
I changed my tires last month. I have 285/30/19 rear and 245/35/19 in the front. I am using Yokohama Advan Sport tires. The handling of the car has changed and I am not happy about the cornering. It has suffered a lot. It could be that the treads are new so it is a little worst than usual, but I will not advise changing the stock configuration by much. It is raining here in the Bay Area, so the wheels are a little dirty, I will post the pictures next week. They definitely look cooler than stock and Yokos go as wide as allowed by the spec for a given tire size, so it fills the well very nicely. However there is a slight bulge on the outside since the rims are not wide enough to take a tire of that size. If you just want looks, you should go with tires this wide, and do me a favour buy mine for a discount. I will just not go this wide again. 265 may be in the rear at most.
Ash