I've seen enough 5" blades to keep me happy for quite awhile.  I think it's time for Scrap Yard to produce something with a blade smaller than 5" or larger than 8".  That's just my opinion, of course.  <img src="/ubbthreads/images/graemlins/wink.gif" alt="" /> 
I with you, and I'm leaning towards the less than 5" in a well designed field blade, but if it's gonna be big, then GO BIG