big center QID

so me and K have decided to try and go to a chess tournament at the end of January since K is going to have a little k running around in the spring. so i've started playing less DDO and more chess again :) I went through a couple of Rubinstein games and I saw an interesting transposition in the QGD

1.d4 d5 2.c4 e6 3.Nc3 b6 giving either the option of the Dutch or the Queen's Indian or something completely different. i tried it in blitz, for what it's worth, and it went okay. the way i play the Queen's Indian i go for the big center anyways. the idea with this though is that after 2.Nf3 e6 3.e3 b6 etc. it's something i'd normaly play. anyways, there's my theory for the month :)