I've had my W53 for about 18-months and love it for its range, 5.8m to 7+. Its design brief is "pure speed" but, if your sailing harbour type chop, the W53 is good.
On a mid/high wind broad speed course (125 to 145 degrees), rolling chop starts to build up and increases further down the course. What starts as glass flat water soon becomes nasty speed course chop half way down.
All the SB speed specials deal with this chop no problems. They are very very difficult to tack, but all gybe OK (especially the W53).
BD was spotted at the Dungarven speed event in Ireland on the 2010 proto's, so I'm waiting to what comes out in August, but I'm going to get the bigger W58 for light wind speed. A couple of SB guys in Holland have told me that the W58 is even better than the W53 in chop. Might be worth looking at that?? Certainly going to be easier in "high wind slalom mode"
P.S. There's a couple of pictures of the W53 in my profile album