Verified answer

Elastic Audio is the biggest new feature by far! System compatibility has also changed, as an example: Windows Vista is supported with 7.4 and higher..

Here is the "What's New In Pro Tools 7.4 Guide"

http://akmedia.digidesign.com/support/docs/Whats_N...

Here is some basic info about 7.4, including VIDEOS of version 7.4's Elastic Audio in use!

http://www.digidesign.com/index.cfm?langid=100&nav...

*Special note, If you got your system or 7.3 version after October 1st 2007, you should be entitled to a free upgrade to 7.4.. You will need to provide proof of purchase, but simply contact Digidesign customer service.

under the outdoors is what i in my opinion choose. BQ: professional approaches-7 kilos under the outdoors-idk, atm i'm liking extreme cost, Small reward BQ2; something tells me it heavily isn't as solid as the two, yet i'm hoping for the best and assume the worst.