I have a Parker 51 and im trying out a 21 now. I have to say that hands down you can really tell the difference between the two. My 51 is definitely a work horse and I dont have one negative thing to say about it. Its an absolute joy to use. I would pick it up over a 21 any day.
Veteran of the Great Irisch Moos Campaign of 2008-9
Proud member of the Great Eagle Group Buy of 2010
I Survived the Great Migration 06/2011
"Gentlemen, we will chase perfection, and we will chase it relentlessly, knowing all the while we can never attain it. But along the way, we shall catch excellence." Vince Lombardi