Everyone loves a bandwagon, but North has surely done the right things to be selected. Many great players retired in the last couple of seasons and so while his current abilities might not quite have stacked up against Lehmann in his heyday, he's entering his own peak now. Of course if youth is the pressing issue there are 23 and 24 year olds leading comparable careers who could also be picked.
That said, if I was going to take a batsman based on what I'm actually seeing right now, it'd probably be Hodge. He's getting on a bit, but he is just a top quality player. Of course, he's one of many who looks in command of his game in limited overs, but I see no safer bet for a Test player.