Congrats on the car! Deffinately have your Hyundai Dealership take a look at the vehicle's exhaust manifold bolts and perhaps even the entire exhaust system for a problematic gasket or something in line. Also on our 2.0 Turbo model I never really notice too much of a cabin drone to it but that could actually be related to your other problem if there is a leak or small opening in the exhaust system causing excess noise perhaps before the catalytic convertors.
Best of luck!
2010 Hyundai Genesis Coupe 380GT
M&S Type A Front Grill
KDM 380GT Emblem
Korean Custom Wing Badge Emblem
Injen Cold Air Intake
SuperLux LED Tail Lights
O.Z. Ultraleggera 18x8F/18x9R
E&G Classics Full Aero Kit