Quite honestly, I think I prefer the previous version of that gun. However, that shotgun pictured is quite nice.
Buying a off the rack Wilson Combat 870 will get you a gussied up 870 Express. I'd much rather have a Wingmaster/Police model "modded" up over an express version. My biggest beef is the plastic triggerguard. I figure a off the shelf, parkerized 870 police, with a Surefire foreend would be quite a suiteable all around shotgun. A sidesaddle if really need be, plus no modification to the fore end would be necessary.
Simple, effective, better overall quality, and lots less expensive. Of course, YMMV.