Sport package is fine. I have the G with the sport package and it feels a lot like my friends who has the BMW 540 with sport. At times when I am pushing it hard into the corners, it actually could use a little more firmness. Premium is also a must.

2003.5 BS, Prem, Navi, Sport

 

I drove the regular and sports models back-to-back a year ago. The sports suspension gave noticably more control with almost no extra harshness. Definitely the way to go if you like to throw the car about a bit once in a while. I like the other features of the sports package too so I would definitely take that option. Note the 6MT Sedan has the sports package as standard.