Originally Posted by
snootyjim
I am currently using a 320GB system drive, with a 3TB server that I backup onto 3TB of external disks.
Now, I'm not recommending that you follow suit, but I've been a lot happier since I cleared all the hard drives out of my PC and just kept it nice and simple with a single drive. I think the best thing for you to do would be to buy a brand new 320GB drive for about £35, and use that as a system drive.
You could get a 1TB Samsung for £60 to use for additional storage (total of 1.75TB) and still come under your budget of £100, as well as having the opportunity to duplicate stuff between the 750GB and the 1TB for additional data security. I'm not recommending that particularly - you probably don't need the space, but it's there as an option if you need it. Keep the system disk small, and just use it for page files and operating system data etc, then you can easily expand and mess around with your storage hard drives whenever you need to. With the added benefit that you can easily format your OS drive without losing your documents.