We are doing floating over radiant. My husband is going to lay the floor. He's actually built the whole 2nd floor addition. Anyway, he really wanted the gluelss click. We looked at a few different samples, and the Kahrs is really the best product we looked at. Unfortunately for us, they didn't have the Woodloc (their click system) in a deep stain color. So we've just ordered the Kahrs Castle & Cottage in Cassis. It isn't cheap, but it is a beautiful floor. A local floor/carpet store had a huge display area of this flooring and it was beautiful. It's still going to be floating but it will have to be glued. Good luck. Definitely get samples of whatever you are thinking of. And if you can find a local store with larger samples, that's even better.

Seems to be a common characteristic, with that particular flooring.

Pros and cons of each? How much time do you have? It may sound like I'm joking...but I'm not. It sounds like you are at the beginning stage of your search. There are SOOOO many variables that go into a decision like this I can't begin to contemplate it. I've sold flooring for years (cork flooring experts need to be educated in all the other flooring types because we have to COMPETE with the other types) and I always start with questions about the HOMEOWNER and the HOME before I suggest anything. Tell me: What are your PERSONAL requirements? What is your climate? What is the budget per square foot? That means the ENTIRE cost of project? How many square feet? What are your LONG TERM goals with the house (5 year flip or 15-20 year 'forever home')? These are just the PREQUALIFYING questtions I like to ask. After that, I start to narrow down the particulars. As you can see, the "pros and cons" of the flooring do NOT enter into the conversation before the homeowner starts to make some personal 'pros and cons' that they WANT from a floor. Personal expectations are what drive "issues" with floors. If you expect a $0.79/sf laminate (as an example) to have the same life span of 1" quarried slate, then you are going to be very upset (again...this is an example). Tell us more so we can help you more.

Three words: Preparation, Preparation, Preparation! Subfloor preparation is THE SINGLE most import thing you can PAY FOR. You need to pay $2-$4/sf for subfloor preparation (cost depends on the current flooring, the condition of the subfloor and the material of the subfloor). No I'm not kidding. The subfloor preparation SHOULD double the cost of the labour!! Once the subfloor has been prepared within an INCH of its life, you can start the installation process. As soon as you have a perfect (or near perfect...cause nothing is perfect in the building industry) base, your flooring product will then have a FANTASTIC chance of being/feeling/sounding great. Remember: footsteps START with the SURFACE the foot hits. That means CARPET is #1. Real cork is next at #2. A TRADITIONAL cork floating floor (not the 'water proof' cork you are thinking of - it has a layer of vinyl/PE on to of it) is the one with cork on the surface. Then at #3 you have Marmoleum....and then way down the list you have the vinyl products such as the WPC or the SPC. Why are those two so low on the list? Because they have a HARD surface. Hard = noisy. Imagine the noise of a stiletto hitting metal (very loud). Now imagine it hitting wood (noisy). Now laminate - still noisy. Now CARPET. Right. Not a sound. Hmmmmm. Soft SURFACE = low noise. So work from the SOFTEST surface up until you hit the target. Carpet is out (because you didn't list it). That means TRADITIONAL cork floating floor is the first choice. But the BIGGEST issue is going to be technical. The size of the room is TOO MUCH for all of the click floors (the WPC or SPC *might do it....but it is possible the size of the room is too big for a continuous install). Yah. The 50 foot run is TOO LONG for a click system. Sigh. That means you need an in-field expansion gap (that means in the middle of the floor. You have a continuous space that is 1200sf (or so). Only the MOST IMPRESSIVE and most EXPENSIVE SPC products can handle a size that big. They can be installed in a single piece up to 1500sf. So now the question becomes: do you INSIST on a single continuous floor? Then SPC is it. There is no other option. Done-like-dinner.