I buy Huggies ones, but I've heard Pampers are better for boys (so my SIL says and she has boys and girls!)
I get them from Boots as I collect my points on my advantage card and at least once a month get my nappies off the points - so in a roundabout way - free nappies.
If you join there parent club too, you get vouchers through the post for triple points on some of the Johnson, Huggies or other baby branded stuff!
Not long left for you now - just got a shock looking at your ticker!!