i bought a dm14 in early september brand new for $900.
Now if you look around you could probably find one for as low as $750 because the 15 came out, which isn't worth the extra money in my opinion, but if money is no object to you then why not?
With all that being said, i just traded a geo1 for a dm13, because i was so overly please with how the 14 shot. Yes there will be some differences between the two guns, but because of the barrel, quiet and smooth shot, no "kick", and with how gentile it is on brittle paint, i would suggest a DM all day.
This didn't really do much to answer your question, but if you get a 14 or even a 12/13, you WILL be happy with it.
New Hampshire Paintball > You