Originally posted by irontigran
ive decided to leave the NID/QID and also stop the occasional modern benoni..
so what you think of the 2 listed? i like the dutch as i do a lot of bird as white, and the grunfeld as always interested me in chopping up the center
(Beaten to it I see! Good post from Tony!)
I think the Dutch will work quite well for most players rated up to about 1800 OTB/maybe 2000 online?!
It is generally a very aggressive opening, and its defects are often very hard to exploit unless one has a strong understanding of positional play. So, if you are tactically astute then in practice up to a certain level it should serve you very well.
The Grunfeld is a different kettle of fish entirely; an extremely reputable opening, highly-theoretical and the mainstay of many top players.
If you are only playing online at a slow time-control (and using databases or expect your opponents to be using them) then use the Grunfeld. If you are looking for an OTB weapon, then the Dutch is a fine choice.
This is only very general advice though : ) You can try both and see which (if either) feels right to you. If not, persevere with the Nimzo-Indian, and use some form of KID/Benoni for passive opponents in particular!