Here are my impressions of my Mossberg Silver Reserve O/U 20 gauge as requested by Ultimate CC in my "New Members" intro.:
I purchased the gun specifically to shoot skeet. While it is far from a "beater", it was not particularly expensive for a decent O/U. It is good looking and feels solidly put together. Lots of nice touches in the decorations, mechanisms, and furniture. I dont think I need to reiterate the spec book, you can get the details here:
http://www.mossbergintl.com/pages/silverreserve.htm
If it were to be used as intended, that is as a field gun for bird hunting, it would be fine out of the box, assuming it fit you comfortably. I found it necessary to make a few modifications to turn it into a really nice skeet gun.
I had Rob Roberts port the barrels for me (I could have gotten by with porting only the Under, but his prices are so good I decided to go for both) and put an extended ported skeet choke in the under barrel and a flush skeet choke in the upper (muzzle flip is all but non-existent now, so second-shot acquisition is a cinch). I put a Winchester Low Profile light pipe sight on the rib right behind the bead. I added a LimbSaver recoil pad which extended the LOP by an inch and makes it feel as soft as an autoloader (if the LOP is too long, you could take the standard butt pad off first). I raised the comb slightly by adding a Soft-Comb Convert-A-Stock pad (which is an inexpensive way to get an adjustable comb). Last I added a 3 ounce barrel weight about 2 1/2 inches forward of the forarm to smooth out the swing (its only a 26 inch barrel, remember).
Total mods came to under $300, which brought the total cost of the gun up to about 1/2 of a comparably equipped and comparable handling, customized gun.
I cant make any durability claims yet, as I've had the gun for only 1 1/2 years, but its doing fine so far.
The only thing my Silver Reserve O/U lacks is snob appeal. I'll have to depend on my Teknys Gold Target for that.