mossberg pump shotgun

Hi! I am interested in a shell holder for a 590, especially in the Mesa Tactical ones. Therefore my picture request: I thought about the 6 or 8 shell holder attached to the receiver. I have concern that the 8 shell holder could be to long and interfere with the handling of the shotgun. I...

Saw this and thought what a great idea! Not sure of price though. Seeing $335.00 Does this seem High, resonable, or a great deal?:confused: http://www.mossberg.com/products/default.asp?id=28&display=feat

Hows it fare in comparison to some other shotguns out there, and whats the mean price range for it?

I just bought my first shotgun today... Here's a link to a pic http://www.webarms.com/gun%20suppliers/Mossberg%20Shotguns/55605.gif It was the only pistol grip shotgun at the whole gun show I went to today...so I went w/ it... I am very pleased w/ it...went and shot off a box shells...awesome...