Buy a Quad G5 or wait?

We have finally been approved to get a Mac at work. :thumb2:
At home, I have a G5 iMac and a G3 iBook. I trust the older stuff, and don’t know much about the Intel stuff. We are about to buy a Quad tower, and I am wondering if we will be sorry when the other towers come out…!!?
Any help would be appreciated.

JM