wjm3982 wrote:good info, thanks guys
how does the ride feel with your new tires? i know the stock wheels aren't all that great, but the sidewall-to-tire ratio on the bigger tires is smaller, and i know i read that smaller sidewalls can lead to a less comfortable ride. i'm hoping that some new tires will handle turns a bit better than the stock bridgestones
Even if you were to put a high performance tire on your rims right now, you would feel a difference in the way the car turns - you'll have much more grab with them. You can do two things - you could buy new wheels and tires, or you could opt to put a different tire on the stock wheel.
If you put new wheels and tires on, you will notice it more when you put a larger wheel on, aka 18", 19" etc...Usually these wheels are thicker, so you can put wider tires on - 235, 245...etc. The wider tires will give you much more road grip and it will handle turns much nicer. The other part to this idea is that you will also have to get a tire with a smaller sidewall, which will improve your ride stability, but also increase what you feel. Running over a pothole with your stock setup will not feel as harsh as if you did with 19" wheels.
You do have the option of changing on the standard rim. Since you have the 3.5se, your standard wheel size is 7.5". You have the ability to safely mount a larger tire on that - a recommended size would be 235/50/17, as this almost matches the stock tire exactly. You could also do 225/50/17, as this is not far off either, and you can save a few $$$ on less rubber.
You then have to choose if you want to stay with all-season tires or summer tires - summer tires will give you the most amount of grip you can get, but won't fair in the snow or real crappy weather. There are a lot of good all-season tires out there that perform almost exactly the same, but come with the added ability of mud and snow (the M+S thing listed on an all season tire). Personal recommendations since you are in Philly and get fun weather and lots of Philly pot holes - don't go over 18" wheels, get all-season tires (i would recommend the Goodyear Eagle F-1 All seasons, the Pirelli Pzero Nero All seasons, or the Michellin Pilot Sport A/S - these are all tires i have used and work amazing, but i am sure there are other tires that people can speak for that i cannot)