I have both a Mossberg 590 (converted to an A1) and a SuperNova Tactical. I like them both.
Now, while I do prefer my 590 for HD, given its greater capacity and front bead sight offering (not to mention the safety button location), I have had no issues with my SNT. In fact, overall, the SNT is a better made weapon IMHO. Sure, it may look too "Star Wars" for some people, but c'mon...this is 2009! Expand your minds a bit people!
Keep in mind, the SNT (as with any Benelli that I know of) is going to be sporting a hard chromed barrel. To me, this is pretty high-end stuff for a sub-$500 shotgun. As for this forend rattle complaint I keep hearing...give it a rest people. My Mossberg rattles just as much...not to mention quite a few other pump shotguns Ive tried. If you guys dont like the look...fine. But, dont dismiss this weapon based on something as trivial as "forend rattle," which again, is noticeable on almost any pump shotgun.
To me, the biggest problem with Benelli shotguns is the lack of aftermarket support, parts replacement availability and/or cost.
Regardless, as much as I love my Benelli, I prefer the 590 for HD. The Benelli is mainly a slug gun now (due to the GR sights and SteadyGrip stock...and the guns somewhat limited capacity). However, I see no real reason why the Benelli SNT would not make for a good HD shotgun. Its a tank and its a good gun...no doubt about it in my mind.
But, in the end, the decision is up to you. Best to try out which weapon "fits" you best and offers the most desireable features/feel based on your particular needs. All else is just mere advice and speculation.