If you are looking for a table to suit an urban-industrial decor theme, don’t go all-out with a (heavy) metal table but consider a (lighter) wood table with some metal design features.
If you fall in love with a metal or marble table, don’t be discouraged from buying it, but do think about how you might safely transport it. As suggested above, choose a small, round marble table, or go for a wooden table with detachable legs.
Consider a designer pack-and-go dining table. Plywood is lightweight and durable, and a plywood table can be flat-packed and assembled as needed at home. Your dining table then can be packed up and moved as necessary. Plus it works well in a home with modern Nordic or contemporary Asian style.
To visualize how a bigger piece of furniture will look, take the time to block out the length and width on the floor, and also the height of the table. I usually stand on my tape corners with a tape measure, then try to fill in that space with furniture of a similar size, and take a step back to see how it’ll feel. It also helps to have a friend stand there with the tape measure while you have a look.