Personally I found a huge difference between 9'6" and 10' in terms of glide. For me you want length, width, weight and flat rocker with softer rails and single fin is a MUST...
In terms of the clearwater boards, you want the Hot Log rather than the Whalebone, Whalebone is more performance. The Creative-Army 10'1" Sweet Love is even better for glide and these boards are amazing but personally I find the CW are better bang for buck