Flooring questions: seal? poly? glue? float? etc.

I need to make a decision regarding my flooring. I have a 9x18 isolated concrete slab on grade (installed with no vapor barrier). I'm trying to decide which flooring to get and how to install it. Should I get hardwood or engineered hardwood? Glued down or 'floated' over 1/8" underlayment? vapor barrier or seal over concrete? I am being advised against glueing the floor due to the work involved. Tongue in groove hardwood floated on an underlayment would be the most DIY, obviously...but I don't want to creat any resonance issues. If I got a nice thick hardwood, wouldn't that resonate a lot less than a thin laminate? Thoughts, suggestions?

I have gone the engineered hardwood route, which looks great, but the glue-down bit really is a lot of work... more than I expected. But to me, it is a one-time job, and once it is done, I am more concerned about the looks and the sound of the room.

i saw a product that was an underlay/adesive and a damp proof course. and one the same that s not an adesive. for both types of flooring

I would be more inclined to try the glue over wood- but I have concrete... looks good doublehelix ;)