I had a 05 facelift 2.0 coupe for over 6 years and it was/is a great car. It needed a clutch after about 40k miles (as mentioned above) but apart from that, I can't think of any cost apart from tyres, brakes and servicing.
Slap on the Tiburon badges and high spoiler that came with the car in Korea and it's a v nice looking car:
I have to agree with others, the paint is quite thin (as most cars seem to be these days) and it can suffer rust on the front edge of the bonnet - the "folds" of the creases each side of the bonnet seem to trap moisture, or do something to cause the front edge at each side of the bonnet to rust and bubble - so worth a check.
As mentioned before, it's a VERY practical car in reality, as long as you don't have teenage kids. The rear seats are usable, but anyone over 5'2'' might start to hit their heads against the low rear window - not to mention their constant moaning getting in/out through the front doors. The rear seats fold down and provides a LOT of space - I've had a set of 4 x 18" alloys in the back or a couple mountain bikes plus a load of gear, which is great (and comically made it being far more practical than the big saloon car I "upgraded" to after it).
In the modern age of hot hatches, it's not that quick (the car certainly looks a lot quicker than it is), but it's a nice car (I still think it's a head-turner, especially for a Hyundai) and can happily cruise at 70-80.
If you're after a coupe it's a great choice, it's only real direct competitor for the age is probably the Celica, which is also a nice car. Personally I preferred the test drive of the Hyundai as I found it more spacious and the celica needed revving more to be as fun - but, with hindsight, as I was looking at 18month old cars, the Celica held its value better so I probably lost out there.