1. Don't buy a 2011 that was built before March 2011. Try to go for a 2012 if possible.
2. Correct, Sport package itself contains NO suspension related improvements. MSport does...has dynamic dampers and ARS. For 2011, you would need to add DHP to the sport package to get the above.
3. The base suspension on the 2011's is pretty non-sporty, IMO. I feel like it's gotten better with the later cars.
4. DHP wasn't normally ordered on Sport cars as it's expensive. Most people went with MSport or just the sport package. The issues regarding the ARS haven't been as pervasive as some of the others (pull to the right, vibrating wheels, etc.)
Sophisto Grau / Oyster - Black Nappa, Anthracite Wood
ZAV, ZCV, ZCW, ZDA, ZDH, ZPP, ZP2, ZSP
Mods - M5 Grilles, BMWPedals Black Anodized
Heaven is where the police are British, the cooks are French, the cars are German, the lovers are Italian and it is all organised by the Swiss.
Hell is where the police are German, the cooks are English, the cars are French, the lovers are Swiss, and it is all organised by the Italians