Posted for Art Jensen <flycassutts@yahoo.com>:

 I vote for nice to have but not necessary!  I have
 them on my Legacy and am glad that I have them.  I
 think you should consider the weight of your finished
 airplane as you consider each of the nice to have
 options.
 
 Art Jensen
 Legacy 927J
 
[ If I had to do it over, I'd nuke the speed brakes
and use the pocket for more fuel. -Rob ]