I have over 1700 sq feet of 3/4in oak and love it! the other 1700 sq feet is tile.( kit, baths, hallways etc..) As mentioned before if there are ever stains that are so bad that sanding would not work you can have it replaced and stained. As for matching it's just a matter of wook size, you can sand and restain to get a constant look.
My old house had hardwood with wall to wall over it, when I bought it the 1st thing I did was remove the carpet and what I found wound make you sick. I called a local guy who came in and replaced 1/2 of the family room then sanded everything and stained it. I lived in that house for over 10 years with kids and pet's and the floors still looked good.
I would look at your long term plans for staying in the house and weigh the cost of real vs fake and go from there.
Just my 2 cents
My old house had hardwood with wall to wall over it, when I bought it the 1st thing I did was remove the carpet and what I found wound make you sick. I called a local guy who came in and replaced 1/2 of the family room then sanded everything and stained it. I lived in that house for over 10 years with kids and pet's and the floors still looked good.
I would look at your long term plans for staying in the house and weigh the cost of real vs fake and go from there.
Just my 2 cents