I'd say it's not worth it, an FX 6300 with a GTX 960 is a good combo, but you're paying a bit of a premium for 16gb of RAM that you most likely won't even need, the PSU is absolute junk, you need to get your own OS and only 120gb of storage?
You missed my point. They're offering that system for £475.99 and claiming a £328.43 (40%) discount. They're saying the total cost of the build before discount is £804.42
If you'll look at the build I provided, it's the exact same specifications (identical parts when possible) and the cost was only £508.57
They say you're getting a £328.43 discount. What I've shown you is that it's only about £33.