last year, a friend of mine bought two tix in the amex presale and got 400's.... then when regular tix went on sale, I got 300's. So don't get discouraged that the presale only has 400's - doesn't mean they are sold out of better tix or anything - just means that's all they have left of their alloted pre-sale tix.
I am not a WH member so this year I am buying on Saturday with the rest. Honestly though, I'm not too concerned with where I sit - it would be nice to have good seats but I've seen them a few times at the amphitheater... have sat in 300's, 400's and lawns and have never had a bad time! Funny enough, I had the most fun the year we sat on the lawns! lol
Of course, that doesn't mean I wouldn't be THRILLED to get better tix!
I took my hubby last year, it was his first time seeing them.... and then when I found out they were coming back this year, I mentioned it to him and he had a fit and said I'd better take him!! hahahahaha apparently I released the Dave fan in him! lol