XP 15            
The XP 15 is a great back-up
weapon.  Small, cheap, low capacity
and rare. I've never really seen the gun
my self, but it sounds like a OK gun if 
you are going to use it as a backup,
otherwise I wouldn't even look.
                  XP  20
 About the same as the XP 40 only
a smaller capacity. A nice backup 
gun [but I would perfer 15] with a 
better capacity than the XP 15.
Easy to pump, but I wouln't use
it in a real water fight.
                  XP 40
 About the same as the XP 20 except
for a bigger capacity and different color.
                  XP 70
    A nice gun with an air -tank that 
shots decently far. This is a good first
Super Soaker and it's cheap. Probaly
better than the 85 if there are less people
in your water-fight because it shots farther.
                  XP 85
     A little nifty gun that shots in 3 directions.
It shots almost or about the same as the 
XP 70. XP 70 costs about the same price,
but 85 is just a little more expensive. It is 
better than the 70 IF you play with more 
people.
                  XP 110
      The best XP gun in my opinon.
It costs a lot more, almost as much as 
the CPS 1000, about 15.99.  It has a 
pressure guage and 2 air tanks. I 
recommend you get this gun or XP 105.