I wouldn't spend more for a better species hardwood, say maple or cherry over oak. 

Some further reading:http://www.biggerpockets.com/forums/67/topics/18091-cat-urinehttp://www.biggerpockets.com/forums/52/topics/48439-cat-urine-hardwood-floorshttp://www.biggerpockets.com/forums/67/topics/48302-dealing-with-pet-urine-in-plywood-subfloorhttp://www.biggerpockets.com/forums/52/topics/32394-cat-pee-in-apartmenthttp://www.biggerpockets.com/forums/67/topics/29131-how-to-remove-the-smell-of-moneyhttp://www.biggerpockets.com/forums/52/topics/37751-third-pethttp://www.biggerpockets.com/forums/311/topics/39475-profitable-house-problems

We refinished the hardwood floors so there's not a whole lot that can be damaged.

If its real hardwood, not that laminate stuff, you can't put it directly on concrete.

I would like to install vinyl plank flooring in the kitchen and hall, but here is my dilemma-The living/dining area has original narrow plank hardwood floors in a lighter finish.

Hardwood (professionally finished) is worth it if the market wants that.

You could do an engineered hardwood in that price.

I do use some high end finishes, like hardwood floors, prefab granite countertops, wood cabinets, low end SS appliances.

The only repair I paid for since then was a fuel pump, about $500.It's a BMW 540i, V8, something around 450 HP, the engine control module  prevents speeds over 150 MPH, the interior is black leather and Cocobolo (exotic hardwood), and if you've never driven a BMW, yes there *is* a difference.I get a reak kick out of the fact that I paid *less* than a sensible car lot "deal" on a used Hyundai.Disclaimers: I do all my own maintenance when time/weather/skills allow.

Vinyl or hardwood/laminate elsewhere.