Whither the House of Lords?

So the Commons have voted for a fully elected second chamber. The danger with this is that it will either become a rival to the Commons, or more probably, just a House of Commons Mark 2. What we need is a second chamber with a different viewpoint, as apolitical as possible, which can look at what the Commons is proposing, point out the weaknesses and curb the worst excesses. What we're in danger of getting is a body which will just rubber-stamp whatever the Commons sends along, because essentially they will be just the same sort of people. Perhaps that was the thinking behind the Commons voting for it?