It'll probably be more beneficial to others for future references if you'd take the discussion elsewhere I suppose, as it is a different yet relevant topic.
Once I've assembled my components I'll start a new thread for specific feedback.
For now I would just like some final thoughts to my initial question regarding the differences between generic/DAW builds.
Every build is about performance and stability. I've only build gaming PC's but let's say I'd have my handpicked A class components assembled by a good generic retailer (in consulation plus the confirmation from the new thread all should be compatible). Would there really be a noticebale difference performance wise?
Even a generic retailer will do stability tests and some will overclock for you as well with guarantee waranty.
So I agree a DAW specialist will probably tweak your system a 100% dedicated to working with audio but as a simple home musician would there really be that much benefit in relation to the extra costs?