I have had mine for more than 18months now. While it is technically my 'daily' car there are many weeks where I dont need it for work, others i use it everyday. Mine has an 8-puk button clutch which is HEAVY! While this is not fun in traffic and with my exhaust the cars loudness can be annoying at times, I find that most of these things are easily forgotten compared to the joy of driving it.
It is truely unlike any car I have driven and every time I start it up I am glad to own it. I am not saying it is the best car ever or anything, and to many people it may be just a car, but for me i really love it, and when you have that you can forgive the car for things like heavy clutches etc.
With the amount of driving you are doing I think it would be fine. Mine averages 13.8lt/100km which sounds like what you are used to anyway. If you do get one, be sure to post it up!