I bought one of the £70 for six sets, boxes and folding boards options a few years ago:
They are perfectly adequate for tournament and match play, I don't think you need weighted pieces. The service was very good, Malcolm Pein is a friendly and approachable guy.
Far more important that the sets, at least to me, was to get the folding boards. These are fantastic and much more usable than the roll-up or stiff plastic alternatives. If you've ever spent the twenty minutes before a league match trying to flatten half a dozen badly folded roll-up boards you'll know where I'm coming from. They're easier to store as well.
I don't like the plastic boxes used for chess sets much, and about a year ago I bought some a large number of drawstring bags on eBay. They were a little pricey, about 80p each, but they've proved to be worth it. They are easier to pack and unpack and also take up less storage space.