Here's my take.

16 M3 in Yas Marina Blue - Can't go wrong, beautiful handling car with plenty of power.
12 Aston Martin Rapide - yes I know a 12 cyl Aston isn't exactly the grocery beater -Hopefully it comes with a bumper to bumper warranty from Aston because these cars have a lot of issues.
14 CLS63 - Feels dated with the new one out but still plenty fast but with a simple ECU upgrade it's crazy fast.
13 XFR-S French Racing Blue. Very very rare - Not a fan of Jags. Not the best built cars.
15 S550 - super posh, lots more depreciation to sustain! - Can't go wrong, drives nice and very plush inside.
17 CTS-V - would order it. Right up there with used Rapide - Haven't driven one so can't comment.
14 S8 - beast of a car. Somewhat bland looking. Have not driven one yet - Rather get the S550 plus new redesigned A8 is coming out so you'll take even a bigger hit in depreciation.
13 G63 - Wife has a GX460 so that would be 2 SUV's - Had a G63 for literally 3 months before selling it. I personally hated it. It drives like crap, tons of wind noise and felt slow. It's a hyped up SUV, not sure why everyone goes crazy over it. Only plus is it keeps its value.