First of all where do you sail ? at a lake or at Sea.
The Dart 18.

+
Easy to handle.
Single handed or light crew.
No Daggerboards.
Easy to repair.
You can sail it till the frontbeam almost goes unther water and stil get it back into position.
Very Strong.

-
Expensive spare parts (at least in Europe).
Some have lamination problems after 16-17 years.


I hope this helps.