Sorry for the late reply, I spent the day (don't tell my boss) on Genesis Coupe Forums (or Fora to be latin right).
I am sorry that I confused everyone with my strange desire: Wanting a nice fun car but fuel efficient too.
There is the reasonable me that wants to get a cheaper and fuel economy car (but fully safe for my 3 year old daughter) and the mid age crisis me that likes sport cars and was surprised to find one affordable.
I am not into bigger more powerful engine, I can get a speeding ticket with everything on hand, no need of a V8 for that.
In my young age, I did more than 100mph with an 1.1l engine engineered at least 20 years earlier (I know because my mum was driving to primary school in a car which had this engine). BTW, speedometer stopped just before 100mph, so I went beyond the speedometer limit.
It seems that I just want a good looking car but still with no so bad fuel mileage. What surprised me is that the Gen Coupe seems to fulfill all my desires, and that a first for me (I still need to check if my child can come in and out easily and that the ride is still quite comfortable (If you know Quebec roads, you know what I mean)).
As for the fuel, I got the owner manual and it says that any unleaded fuel is OK. On the forum, a lot of owners tested all the flavors and none of them can say for sure that they had better fuel mileage with premium gas (in fact, most of the best mileage comes from 87 octane gas). Another good point, quite some owners achieve and even beat EPA ratings so that is better than the Rogue (same city but better highway rating due probably to aerodynamics). I drive mostly highways (use public transportation for the city), so that is a plus.
On the oil side (that is a oil forum after all), good surprise, Hyundai accepts 5W20, 5W30, or 5W40 on the full temperature scale, meaning that I will be able to use my stocked oil. Oil interval is quite short (5000kms initial and then 8000kms) but in the average range with Toyota for example.
As for winter rims, owners were able to use 17" rims so I will be able to save a bit on winter tires (mandatory here).
Overall, it should be as expensive as owning the Rogue (Insurance is about the same), with the RWD fun part as a bonus. That is not as good as going with a Fiesta or another small car, but we only have one life as some said in the Miata thread.
I will probably test drive one next week and report.
Thanks for the help.