if you HAD to choose one...
and you want to personalize your PV with a design... then THE CHUCK is your obvious choice.
if you don't have any design ideas, but still want a beautiful PV -- Silver Bullet is your obvious choice
IF and that's a BIG if you have a problem with your PV and want to fix it yourself.. then The CHUCK would be easier to DIY if you so desired....
other than that
BOTH are GREAT PVs....