If you are performance-oriented, you'll prabably want to upgrade your WLAN card to an Intel 6320 if you still want Bluetooth on the card or an Intel 6300 if you can do without and want the fastest possible wireless speeds, assuming you've purchased a faster wireless connection from your ISP.
You'll also probably wish to add an SSD and do a clean Windows 7 installation, such as discussed in
http://www.overclock.net/t/1156654/seans-windows-7-install-optimization-guide-for-ssds-hdds.
It has been my experience that uninstalling applications typically leaves remnants behind in the Windows Registry. Rather than trying to uninstall the ASUS Bloatware apps, it's better to start fresh and never install them in the first place. The ATK Package drivers for the function keys are all you need. Plus, you can always download any of the ASUS apps you like.
If you've created the Recovery DVD's from Ai Recovery, you can always restore your G74SX back to a Factory state (e.g. for resale) if you wish. Although a potential customer would probably prefer you restored the clean Windows 7 System Image you backed up using Windows Backup & Restore anyway...
G74SX-A1 - stock hardware - BIOS 202 - 2nd Monitor VISIO VF551XVT