I own a mossberg 590 A1, with ghost ring sights, and thought it was the the bomb for a while... then realised that the actual use i have for it, is negligible. the barrels too short, the whole thing is too heavy. Sure it's got a lot of 'cool' factor but while my friends were actually hitting the clays, I was just getting a sore shoulder shooting into the air. I just recently picked up a remington versa-max and while I haven't had enough time to give an opinion on reliability, the fit and finish is much nicer, it shoulders great, 28" barrel and it came with the case, and 5 choke tubes plus it can handle 2 3/4, 3, or 3 1/2 loads.
My experience has basically told me that the 590 was a waste of money unless there's a zombie invasion, oh, and blowing up pumpkins.... Any form of sporting/hunting use is nearly negligible. The versa-max will do anything that I require the 590 to do, and it will do more. (I'm not fighting zombies on a regular basis... ).
TLDR: I like the remington versa-max, check it out it's a pretty sweet little set up. If dedicated to a pump I'd suggest an 870 w/ sporter barrel, and leave the "tacticool" at the store.