Well... I was going to get a Ruger a couple years back. I shoot long guns left-handed, and wanted it in stainless...couldn't find one, tried to contact Ruger and NEVER got a response, after multiple attempts. My last words to them were that I was not going to buy their products if they couldn't even respond to a request for information on availability. I thought of that today when I put a half-price Red Label 20ga back on the rack in a shop today.
So I may pick up that Mossberg. On the plus side, it will take a PMAG, unlike the Ruger, which only uses proprietary mags. It is also a couple hundred dollars cheaper, in the 5 range rather than the low 7s (to around 9, depending on the store). On the down side, it does not (yet, it will undoubtedly be offered the day after I break down and buy one) in either stainless or lefty. But I want to look at one in person first. The stock looks a little iffy on the website, and I don't know about fit and finish on their rifles (I do own two of their pump shotguns).
Keep in mind that, barring use of ammo designed for those short barrels, your muzzle velocity is going to be a little south of the factory claims for a .308, which will reduce its effective range a bit. I hear there are some rounds being sold (Lapua) designed for carbine length .308 rifles now. I would prefer to have a chance to shoot one through a chrono before I commit. Probably not going to happen, tho.