Here's my most likely flooring -
it's Armstrong floating vinyl tile (more like planks) 12 x 36. They do stick to each other. I'm thinking that'll be easier for me to put down (and faster) and easier to replace a piece if needed later. I just laid it out to see how it'll look. It isn't stuck down yet. I only bought 1 box to see how I liked it and I think it'll be fine.
Oh, I've rearranged a few 'tiles' since this pic to spread out those darker areas in some of the tiles. Looks much better.