I say go all out too. I got everything matching for DD#1. When I found out I was expecting another girl I had the same feelings as you - no point buying clothes etc because DD#1's would be fine for #2. Hasn't worked that way - DD#2 has the same ridiculous amount of clothing that she will never wear out and her own beautiful nursery. I think each child deserves to be made a fuss of and have lovely things of their own, whether they are the same sex as their older sibling or not (and whether they know it or not!)