Just my own take on the situation: If you want to use film and want different results from a P&S, avoid (most) zooms and, especially, something like a 28-200 (though some have the reputation of being almost decent).
Again, Why do you want to use film? What kind of pictures do you want to take?
If you want to enter a different world compared to your P&S, look for some good non-zoom lenses to start with...
The rest, again, depends on the kind of pictures you want to take.