You cant go wrong with the Benelli, but I have a biased opinion. Although the aftermarket isnt there for the Benelli like it is for the 870, 500 or 590 the fit and finish on them is a bit better. The little aftermarket that there is for them comands a bit of a premium as well but it's expected.
In my opinion the Comfort tech system is just an evolution of the recoilpad. In addition, for non Comfort tech stocked Benelli's you still have the option to install teh mercury recoil reducers. Not sure f the cxomfort tech stocks have this provision in them.
Either way in run and gun games you will never need to use 3.5" shells and rarely 3" as most poppers go down with 2.75" #4 OR #6. But it is one of those rather have and not need type options. My advice would be invest in about 6-8 Azoom dummy rounds and practice practice practice your slide manipulation, side saddle grab and loading. You'll get faster as time goes on. Also, if you have the privacy in teh yard or the space in the basement, do some running drills as well as if you were moving from stage to stage.
Atthe end of the day the pump wont be as quick as teh semi, but your in teh game and that's all that counts!
here's my old run gun. I don't think Benelli even brings these in anymore. Benelli Practical all factory 9+1, Ghost rings, ported, oversized bolt handle & safety, pic rail and speed feed.
And you don't know what recoils is till you've put slugs through this with teh stock down or knocked off some hinges via pistol grip. This one's been worked HARD and shows teh reliability of teh 870. She aint a prom queen, but she'll take you behind a shed and get it done!