Andrew,
I've got a 590A1 with ghost ring sites, a sidesaddle, surefire forend, AND a speedfeed (III I think) tactical stock (full stock with a pistol grip similar to a Benelli tactical stock). I love it. It shoots great, has never jammed or failed to fire, and is quite accurate with slugs too. The day after Christmas, I shot a <1" 5-shot group with Brenneke KO slugs at 25yrds. My wife likes the stock too, she says the recoil is more managable. I tend to agree. If you want a 590, make sure to pay the couple extra bucks and get the A1, not just the 590 "Security". The A1 will be marked as such, quite visibly. The difference is a heavier barrel, and metal saftey and trigger gaurd. Around here, the difference in price is about $30.
-John
[This message has been edited by John Overbey (edited January 18, 2000).]