GRRM´s a Song of Ice and Fire, continue reading or wait?

Hi all of you,
Currently I'm reading George R.R. Martin's a Song of Ice and Fire. At this moment I've just started in book 3. According to GRRM himself there will be 7 books (most likely) while only 4 are released. The last book can wait till 2011, or so GRRM believes. Now I've heard people saying its better to wait after reading book 3 untill all books are finished, because book 4, a Feast for Crows, takes a different course, or so they say. Are there some readers here who can advise me on this? No spoilers please, I'm gonna hate you for that

Btw: ASOIF is the best series I have ever read!

Keep reading. It's just awesome. It'll make you appreciate the new books when they come out. I think I've read the whole series 4 times.

HBO has also gotten the rights to make a series about the books.

I'd recommend finishing book 3 - it's the best of the series. I didn't really like Feast Of Crows because IMHO it plunged squarely into fantasy soap opera territory without enough epic happenings to keep my interest.