This article is pretty easy to follow and contains the steps needed to transfer your iPad content to the new computer.
http://www.tcgeeks.com/how-to-sync-ipad-to-a-new-computer-ipad-tips/
If you want to just transfer the iPad backup to new computer here is where it is located.
- Mac: ~/Library/Application Support/MobileSync/Backup/
- Windows XP: \Documents and Settings\(username)\Application Data\Apple Computer\MobileSync\Backup\
- Windows Vista: \Users\(username)\AppData\Roaming\Apple Computer\MobileSync\Backup\
The information is from this article
http://support.apple.com/kb/HT4079
This thread also discusses how to move the iPad content to another computer.
https://discussions.apple.com/thread/2431472
Message was edited by: Demo