I think that a lot of students are asking this question...some even wondering if the 04, or 05 one is still good enough. IMHO I dont think there is anything magical in 07 that isnt in the 06 edition --you can even point to areas that were changed in the 07 ed. that arent as good or obviously wrong all together. The drastic change was from the 05 to 06 when they went to a systems based format. If you've already become familiar with your 06 FA, meaning adding your own notes, etc I dont see any reason to change. Make sure you update all the known errors ( I think there is a thread here somewhere, do a search OR go to the FA06 page on Amazon.com and I think a reviewer has linked or copied the corrections). If it is really bugging you that much that you dont have the 07 ed, save your money and look for the FA 07 .pdf online -its out there. 😉 Good luck.