Bump for you.
I used to have a 2010 Genesis Coupe 3.8 Track Edition (Brembos, LSD, HID, Nav, Track Suspension) with 6-Speed Manual and it also had about 21,XXX miles on it when I sold it. That was indeed a fun car.
If I were you and getting rid of yours for another car, I wouldn't get a Lexus IS or a Infiniti G37. Get a 335 and call it a day. GLWS