Yes they should be...........however be aware that pcpartpicker, is always out of date, and limited, so doesn't actually give you the best deal.
One thing I would change is the suppliers, stick to ebuyer, amazon, scan and novatech, the less suppliers the better. Of which Ebuyer, amazon and novatech all generally offer free shipping, and anything other product added to a free shipping item is also shipped free.
One thing I should point out is that the aftermarket cooler comes with a small syringe of their cooling compound.
Not sure on the pci network card card though whether it'll fit, nor do I understand why your getting one, as your motherboard has one, infact all motherboards do.
The graphics card price is out of date, its £130 on offer, however its the 1gb version. 2gb version is far better these day, some games use it a lot like GTA series, They tend to do good deals but costly p+p cheaper then rivals, consider only for the gpu.
http://www.pixmania.co.uk/uk/uk/12638311/art/generique/radeon-hd-7870-oem-2-gb-g.htmlYou also forgot to get a dvd drive, about £13 from ebuyer.
Also understand the limitations of a cheaper and a mATX mobo, eg only 4 sata ports of which 2 are taken up by the dvd drive and the first 1tb hdd. And that you have 6 usb's at the back, no support for usb 3.0. The cpu power pin is in a weird place in my opinion.
Also its a older motherboard version, so be aware that the bios may not be up to date to run the 8320, so you may end up sending it back for them to update it themselves and regive it back to you.
Not a fan of the case maker, but it should do, often see it as a favourite for budget gaming pcs on sale.