The only thing I would say take a shot at is a 500 GB HDD. I can fill 320 GB's with just my games library alone and it isn't that big (of the games that I play at least). 320 just feels too..... small, O guess. If you can't buy one, scrap one! Obviously new is better but I have scrapped laptop HDD's before and never had problems. Obviously this is subjective but thats up to you really.
The new system is built, sorry don't have pics yet - it looks awesome though.
She uses the PC for Internet, Netflix/Streaming Services, Music, Picture Editing, Office, Gaming (not very often, mainly a console gamer atm) - Basically a little bit of everything.
The main reasons I opted for a whole new system instead of upgrading various components are:
Slow Performance
SATA 2, PCIe Gen 1, USB 2 Limitations
Lack of USB Ports & PCIe Slots
4GB of RAM is below the minimum requirements for some titles and isn't enough for editing pictures among other things.
The GTX 560 no longer meets the minimum requirements for some titles.