Not selfish at all. I'd say your BIL is the selfish one!

You will find the D80, especially with a 70-300 lens on it, is hard to carry some places and there are places you just won't want to take it. It's a big, heavy camera, it's expensive and you won't want to risk damaging it. I love my d80. It takes a fabulous picture, but I bought a D40 as a back-up camera. Taking the D80 on the dogsled or kayak is not going to happen! Stuart has my Olympus Stylus now and I sometimes miss that little camera!