Out of the three you have listed I would go with the S60R. The S4 is a fantastic car, but they make the Volvo look cheap by comparison in terms of maintainence and repairs. I love the S4, but would have a hard time buying one. Leasing one, well that is a different story.
The interior on the G35 is shyte. I wasn't particularly impessed with the performance either.
300C (SRT-8 even) is a great car for the money, I don't know if buying a stick is mandatory or not though.
The CTS-V as previously mentioned is worth every penny (IMO)
The lincoln LS is nice, although might not have enough "sport" in it for ya, and it is auto only as well.
Did you have a budget in mind?
