I agree with all the positives about the SBE2. The fit and finish is awesome, but the mechanical reliability is what really shines in the field. A few years back I took a trip out west and had everything from 80 degrees dusty and sunny to freezing mud and snow in the same week. The guys in my group were all having trouble with jamming guns due to the conditions. All except for one guy - the one with the Benelli SBE. I was shooting a SX2 at the time and it was a nice gun. Like Mudhen, I found it had to be cleaned constantly to function properly. It never caused a problem hunting around home, but on a expensive trip it sucks to have the 1 shot auto in your arms. After that I went out and purchased my first SBE. It was so awesome that I bought the SBE2 when it came out.
I also owned a AL391 until recently, which was a great weapon... but a pain to keep clean with the gas operation. I traded it for a Legacy. The ease of cleaning and breakdown, as well as the reliability made it easy. The people I see complaining on these forums fit 90% into Tucker's response. I personally don't find either gun a bad choice for the range. I don't notice a big difference between my Legacy and the AL391, just don't expect the lightest loads made to cycle - they might, just don't expect it. Hope this helps.