Hi, Drew: welcome to the forum. This should be fun for you.
Sounds like the 2.0L is your buggy. Power is wonderful, and the 2.0L is no slouch: it will go tons quicker than you'll need 99% of the time. My reasons for insisting on the 3.3L have nothing to do with anyone's reasoning but my own. If you're confident that the performance of the 2.0L will satisfy, then get it.
The Singer across all trims did not demonstrate any contrary "first year model" issues. Individual vehicles have imperfections. But the vast majority of vehicles are virtually trouble free. I base this assertion on over 22 months of daily frequenting this forum and taking an avid interest in other owners' problems (I'm not that common, this way). The very first issue that I clicked on was paint quality; specifically paint chipping/flaking, i.e. adherence.
Discussion of Stinger paint quality (Was - Paint Chip Issue) Well under 4% of the forum membership have responded to the poll. Taking into account a sizeable portion of the membership that don't own a Stinger (c. 25%, my estimation), and c. a third of poll respondents saying "No" to experiencing paint issues, we arrive at a conservative estimate of c. 3% of poll respondents who say "Yes, I have paint issues". These include ALL issues, which range from a tiny chip under the forward-lower corner of the driver's side headlight assembly, to actual chips and flakes of paint in areas not attributable to road attrition. The most common of these are the forward edge of the hatch, the rear edge of the roof, the rear edge of the hood (watch for this one especially, as ignorant handlers have pulled up on the windshield wiper arm and scraped the rear edge of the hood). Short version is: check out the car you have your eyes on thoroughly; the odds are heavily on your side that there are no paint quality issues.
The other very common complaint (equally rare) is extraneous noises; typically a hatch lid thump/clunk/rattle. Much less common (and non existent in your base trim) is a sunroof "rattle": the hatch noise has been quite easy to fix (the sunroof, not so much). Other "ticks" or annoying noises sometimes come from inside one or more doors, or the dash. But these are very rare indeed. You'll know when you test drive the car if that vehicle has anything making extraneous noises.
Vehicle history is the bottom line: has the car you'll buy a trouble-free history of 15K miles? If so, then don't borrow trouble; it should continue trouble-free; so say the odds. Mine is trouble-free at c. 34.4K miles and almost two years.
2.0 is still a great car and you will enjoy it.
At least you will be "intimate" with your car when done. 
