Personally I really love the brass base with concrete top! I think it is more interesting, it is hard to tell with the black table from that picture. I don't think it will clash much with the silver frame and a blue wall. If u want a more light airy feeling I would go with the brass, but if you are thinking more dark then stick with the black. Does the room get a lot of natural light? or no? If not, then I would stay away from dark cause then it will be REALLY DARK and might look more dull and dreary. As for chairs, I think simple upholstered chairs nothing too crazy whether you want to pull from your blue wall, maybe a blueish color that will accent that or if you want to keep it more simple like a beige, champagne color would be beautiful with either the black or brass table. Below is an example of style of chairs, not the color, but these chairs do come in various colors. Best of luck!

Black table looks like an office Conference room table. The second table base looks like will be hard to both sit at without those base angles hitting knees & also hard to add extra chairs to if needed bc of those base angles. And, I guess once either table in place, don’t plan on ever moving them with the weight! Seems my vote is neither one & especially without seeing space they’d be in. Both seem ultra modern. Not my style but I can certainly appreciate the look in certain spaces.

@Coastal Floors Georgia where are those chairs from? Also I agree the stainless steel table looks more like office furniture. I found one more option with gray ceramic top and colored stainless steel base from Room and Board. The brass table I worry about quality since it is from West Elm but I do love it.

The chairs are from lekkerhome.com

To find similar chairs like the ones pictured, use a picture search on pinterest or google! Hope this helps!