Updated Editions

Recently, I saw that you can now pre-order the new 2010 edition of The Mammoth Book of the World's Greatest Chess Games. I have the 2004 edition of this book. Do you think that it's worth getting the updated edition?

http://amzn.to/a7FahN

You can also now pre-order (sorry, not preview) the 4th edition of Silman's How To Reassess Your Chess. This edition is apparently a total rewrite and completely different from the 3rd edition, which I have. Do you think that it's worth getting the updated edition?

http://amzn.to/aUTb9W

By the way, how's everyone enjoying the new email?

I have been waiting to buy the 4th edition of Reasses for a few years. I will be purchasing it as soon as it's available. The 3rd edition of the book is one of the best books I've read. I've read it several times. A complete re-write will be worth the new purchase, I am sure.

The 4th edition is supposed to be completely different than the others. Get it, if you liked the others :)