Talk to the staff at a high end [not Home Depot or Lumber Liquidators] flooring store about your options. My husband also says you can't do hardwood on a concrete slab as I was suggesting that for my sister's house that is a concrete slab.

I sell engineered antique heart pine and engineered antique oak for a concrete subfloor, heck i even sell a 1/2" solid antique heart pine that can be glued straight to the concrete if you will use bostix best glue...take a look at how i do things at my website and if you want me to quote you , send me a square footage of what your looking for and where your at and i will do a shipping quote. Cheerswww.interstateflooringandstairs.com