Find 'em discounted and buy them one at a time, very gradually.
Y'know, I have to say that I like most of the changes so far. Plus, I really like the expanded DMG and MM. Since 3e came out, I always felt just a bit disappointed that those two books were substantially smaller than the PHB. I was very pleased to see the DMG, especially, packed with a lot of cool stuff. OK, I have the Epic Level book and the Manual of the Planes, but I still enjoyed seeing some of that stuff make it in.
I do think they shouldn't have made such a substantial revision so soon, so I'm not too happy about that on principle. In reality, though, much of the revision is stuff I simply like a lot, so in that respect I'm glad it was done.