Great info! Thanks for the replies thus far. So, the scope "issue" really isn't much of an issue. That's good news! Does anyone have much experience with the irons on the rifle? Or am I the only one poor enough to have to live with them for a while? 
Unless you have no neck or the neck of a giraffe, I don't think you'll have any problem with a scope.
On scopes....if you are stretching to buy this gun, there is nothing wrong with getting an inexpensive scope to start out with even if you eyes are good enough for irons.
Mueller makes a good 4x16 that runs about $120
There are lots of decent 3x9 scopes in the $80 to $100 range (3x9 is a brutally competitive market)
And there are 4X fixed scopes that are good in the $70 range.
There is always the Centerpoint line where you could get a 4x12 for about $60, but I would rather have a better grade 4X than a 4x12 Centerpoint for about the same cash.
If you are used to shooting with irons, the ones on the 550 FS are excellent sights.
If my Dad (R.I.P.) saw me putting a scope on my 550 he would laugh at me. He used a Remington 700 BDL for deer hunting for many years and never put a scope on it and he never had a problem taking deer out to 150 yards with the sights on his Remmy and those sights were not as good as the sights on the 550 FS.
Something to remember about the 550 FS rifles is that they are built by Europeans specifically to be used with open sights and the ones they put on them are good ones.
Its really only Americans that think a rifle isn't finished until there is a scope on it.