Dave,

There is a difference in the Shadow and Eclipse beyond the length difference.
The Shadow is smaller in other dimensions as well. For me (5'10", 180lbs) the
Eclipse handles much better, especially acceleration. Someone with a smaller
frame may find the Shadow much more responsive.

Two good ways to buy a boat: 1. Try lots of boats and see what you like best.
Ask others what they like about their boats. Ask what factors you should
consider. Then after all your research, buy the right boat. 2. Get something
inexpensive (used) and get on the water. Then do method one and either sell
your first boat or keep it for others to paddle with you. Personally I went
the second route and found I was able to learn more about paddling and boat
design while on the water talking to people and trying things than from reading
about it.

From the boats you mentioned, I like the Eclipse and the would suggest you try
the Wilderness Systems Tempest 17. Having said that, try lots, just include
those in your tests.

Brian Blankinship