I'm still running on the RE92's, which as all subaru owners know, pretty much suck. I have a regular wrx 04 sedan, so I'm trying to figure out a nice set of all-season tires. I was looking at the Falken Ziex 512's, or the Pirelli M+S. I'm also thinking of upgrading the wheel size from 16" to 17". What are the Pro's/Con's on doing something like this?