Ok, I understand now. I had no idea what an SRD was, and thanks for explaining. The books are useful, but I cannot afford all them. I have bought monsters and the core rules, and I would recomend people to buy them rather than use the SRDs, unless they are waiting on an order.
The only thing I wanted to use was the additional cultural backgrounds and professoins found in companion, which I am not going to buy a full book for to just use a few pages of material.
I agree, the SRDs are no substitute for actual books, I love the art in the monster book, and to be honest it is just a balls to print out all the SRDs and bind them as it is too unwieldy.
If i like more of the material from the SRD, this means I have to use it in more games, which means I need it in a better format, and maybe then I will buy the companion, but I see no need for it now.
I do however plan on getting the dragonewt book, maybe Blood of Orlanth, and possibly the Glorantha book, not sure yet.