Well here is my take on this, I know I'm 2 years behind the last post but new to the 500 game so get over it! ;-)

I recently picked up a pair of 500's, an 8 3/8 and a 4 incher.While I was in the market and doing research on these things I was really looking for the 6.5 model, oh well these two fell into my lap and here we are.

With reading a lot here and asking opinions I was set on keeping the 4incher.... BUT... after shooting them and playing with them both I really love the longer model.In fact I just traded my 4 incher for a 6.5 incher.Have not received the 6.5 yet ,should be here Tuesday.. cant wait and hope I didn't make a mistake.. I'll let you know.