Is this enough to run Win 8 Pro properly?

I was looking for some advice from people who have more technical knowledge then me on whether or not my computer would run Win 8 properly. I have already ran the upgrade advisor and that said it should work fine. My problem lies whether I should upgrade the ram so that it won't slow down my entire computer when I'm running iTunes, or playing something like Starcraft 2. My specs are posted below. Any advice would be appreciated, thank you=)

Manufacturer Gateway
Model DX4831
Total amount of system memory 6.00 GB RAM
System type 64-bit operating system
Number of processor cores 2
Total size of hard disk(s) 915 GB
Disk partition (C:) 703 GB Free (915 GB Total)
Media drive (D:) CD/DVD
Display adapter type ATI Radeon HD 4300/4500 Series
Total available graphics memory 3291 MB
Dedicated graphics memory 512 MB
Dedicated system memory 0 MB
Shared system memory 2779 MB
Display adapter driver version 8.920.0.0
Primary monitor resolution 1920x1080
DirectX version DirectX 10