I am often looking on the GLTC website at all the lovely table and chair sets they have. But they're out of my price range.
We at the moment, have the bog standard ikea one, which I wouldn't recommend, as although it does the job brilliantly, it's got marked up very easily, and the groves make it very hard to keep entirely clean.
If it's for a playroom and not for in the lounge like ours is, I would get the Mamult range which is completely wipeable and the table it a decent size should there be more than one sat around it doing painting for example.
Another place, is John Lewis - they're tables and chair sets are lovely, but again are along the same lines at the GLTC prices, so it depends on how much you have to spend.