Soldato
The issue is that it's an Alfa so is it going to fall apart? I've not looked at it in depth in terms of common issues and reliability ratings.
Mine has been solid, I did break down back in December but that was due to a security device I had fitted shorting out. They're a little temperamental electronics wise, as in, the slightest sensor error will throw a lot of warning lights but won't see you breaking down.
I would say it's worthwhile getting the Q2/rear LSD and adaptive suspension (think it's called Performance pack B, but they've changed their configurations so much). I don't have it on mine, and wish I did - mainly for softening the suspension on the absolutely awful roads we have.
I'm not sure what 20k gets you, but would try and get a MY20 or later for the improved interior.