Reading lead sheets is way more ability than most classical guitarists start out with. In fact you will have no difficulty in finding many beginning pieces where you don't play more than two notes at a time. (Start out with Bach Minuets...It's his mark of genius that any of his pieces will make the rankest beginners sound like a god on any instrument)
Another advantage of classical guitar is that most of the music being over 100 years old is not subject to copy rite law and freely available as tab.
The nail thing is not a very big issue. It is enough to have nails that protrude just past the tips of your fingers.
You will find just as many flavors and styles available in classical as there are in pop...from the earliest troubadour styles through the lute based music of the late middle ages and on into the ages of Baroque, Romance and the wonderful hybrids of Spanish an Europian music from the first part of the 20th century. (ERG knowledge will really come in handy for lute work!)
If you're not going pro, I can highly recommend any Yamaha or Ibenez classical. For a little more the dean Espana line offers cutaways and decent electronics. If you've got money to burn Alverez guitars are great!. Best bet is to buy a yamaha beater and figure out what you want after your comfortable with your playing and know for sure what style you're going for...There's huge sound and construction differences between mainline classical, Flamenco and jazz oriented nylon string guitars.
The main problem I had in getting started was in learning to use my fingers individually and then retraining them to work as a group. (Bitter in fighting between my index and my ring finger ...and don't even get me started on my middle finger's drug and alchahol problems!
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...Just a serving suggestion, not what's reall in the box!