Even if it was within your price range, the Alfa really isn't suitable as a daily driver.
First off, sort out if you want a sports car or a heavier but less agile grand tourer.
Among sports cars it's hard to argue against a Miata if it provides all of the performance and comfort you need. In some ways I prefer how the NC drives, but the ND (2016 and up) does ride better and is more refined. I don't know if you can get an ND within your budget yet.
A Volkswagen GTI with a much sexier body, the Audi TT might be worth a look. We have very little reliability data on these, but mechanically it's very similar to the GTI. If you won't be driving in harsh conditions or driving many miles, a second-generation TT (2008-2015) would probably be reliable.
The Porsche Boxster tends to be reliable in our stats, but at least partly because many of them are weekend cars. I don't know how many years or miles one needs to have to fit within your budget. Those 2004 and older tend to be much less expensive because of known major issues with the engine. In our survey, though, only about one percent suffer a catastrophic engine failure each year.
My personal car, the Mazda RX-8, is an acquired taste. I love the handling--far more agile than a Genesis Coupe or G37--and don't mind revving the rotary engine (it makes little power below 4,000 rpm). But fuel economy is in the teens, not good for a car that isn't especially quick. Comfort is better than in the related Miata. Utility is about as good as you'll find in a sports car--but you mind not need this benefit. The engines are prone to failure, but this also makes the cars cheap to buy. Possibly worth a look if you want a car that is very fun to drive at a minimal price.
I personally don't care for the structural rigidity (or lack thereof) of the C4 Corvette. Aren't C5s or even early C6s available in your price range? I didn't really care for the steering of Corvettes before the C7, but if you like how one drives and the price is right, Corvettes tend to be reliable (though quite possibly for the same reason as the Boxster).
Ditto the BMW Z4 and Mercedes SLK: probably reliable as weekend cars, much more of a risk as daily drivers with a lot of miles. The earlier Z3 can be fun, but isn't as solidly constructed as other BMWs.
Now for some grand tourers...
I don't see that the Tiburon is worth a look. Within your budget you can easily get the more recent Genesis Coupe. The 2013 and up are best. The ride might be too firm for your taste.
The Infiniti G37 is somewhat more polished and more comfortable than the Genesis Coupe, and pricing on used ones tends to be attractive. With the sport suspension that ride can be firm.
Have you driven any contenders yet? If so, what did you think of them?