Originally Posted by
simonw
One thing I have noticed from your proposed spec is that you have both a SSD and HDD, the Zotac board currently only has 2 sata ports, and at least one of them will be used by your optical drive. The new revision of the Zotac 9300 ITX will have 3 sata ports and will suit your needs, but when they will arrive in the UK is anyone's guess.
mATX is also good especially for enthusiast hardware. The advantage is that you will be able to reuse more of your existing components, and of course there is a lot more choice. You will however have to choose a bigger case compared to the Sugo SG05, but that is the compromise between mini-ITX and mATX.