Zig Zag racer?
Keep a couple of things in mind with the Zig-Zag.
There is no hop up path for these without replacing everything including the electronics. If you go with a hotter motor or more cells you will burn up the electronics as the ESC is of limited capacity. The boat is built around the electronics from the Firebird XL and you would have to replace everything when you smoke the ESC since it is a combined unit consisting of the receiver, servo and ESC all in one.
Otherwise you will have a hard time finding a better value than the ZZ for a good performing pool boat. $79 with FM radio is darn hard to beat.
Mike N
Twmaster