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.
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.