My classification:
D40 - Severely restricted by lens choice and flash options, but the most magnificent camera for a beginner, moving up from P&S.
D40X - Still very restricted and much too expensive for what it offers.
D80 - A magnificent camera for the serious enthusiast.
So my advice to many friends have been - Get a D40 to start off with, but keep in mind that your needs may outgrow the body within 3 years.
Ignore the D40X. It uses some nice D80 bits, but it suffers from the D40 restrictions. Go for the full D80 instead.
D40 - Severely restricted by lens choice and flash options, but the most magnificent camera for a beginner, moving up from P&S.
D40X - Still very restricted and much too expensive for what it offers.
D80 - A magnificent camera for the serious enthusiast.
So my advice to many friends have been - Get a D40 to start off with, but keep in mind that your needs may outgrow the body within 3 years.
Ignore the D40X. It uses some nice D80 bits, but it suffers from the D40 restrictions. Go for the full D80 instead.