One of the first things you will have to ask yourself is where you will be placing your dining table. A round table curiously seems to draw all elements that surround it towards it, thereby anchoring itself (and the chairs) visually more than a rectangular table would. It also takes up less space.
While upholstered seats might sound a little traditional or old fashioned, they are actually just exceptionally classic, elegant and beautiful. To modernise traditional dining chairs, grey fabric is a very on-trend choice that will never date or look anything other than sumptuous and stylish. For a really luxurious choice, deep velvets and stunning brocades should be at the top of the potential fabrics list.