What's the difference between the Honda Accord types; EX LX, DX?
 

which is the best?

Ex is a coupe(2 doors), Lx is a sedan and Dx is a hatchback

I think they have to do with the features on it. For example, I have a Honda Accord EX and I think it includes a moon roof and high performance wheels and such, but I'm not positive on that.

This tells you the things that the car comes equipped with. The coupe and sedan thing has no relationship with this. The DX is the one with the least features, no electric windows, cheaper seats and wheels etc. LX has electric windows and locks, and better wheels, and the EX has all of the LX and a moonroof, better wheels usually comes with more speakers too.