If pond water levels stay relatively static, then fixed is the way to go.

If water levels fluctuate, and you don't mind the dock potentially being high above the water, then a fixed is the way to go.

Other than that, floating is the route to take.

Floating/fixed, the actual walking surface and support structure (joists, etc.) should be relatively the same price. The price difference is in the posts/floats and related hardware necessary for both systems.


www.hoosierpondpros.com

[Linked Image from lh6.ggpht.com]
http://www.pondboss.com/subscribe.asp?c=4
3/4 to 1 1/4 ac pond LMB, SMB, PS, BG, RES, CC, YP, Bardello BG, (RBT & Blue Tilapia - seasonal).