Hi Alex sounds exciting, however I might have to agree with Glen for build or not to build.
Recently with the help of a very experienced IIS member I too built a new Desktop, with components suggested by this member.
It was exciting buying all the bits and pieces needed to do the job, and when I had everything I slowly put it together.

After much communication and suggestions from my friend I eventually got it all together and pressed that button, if fired up at a 100 miles an hour and all was well.
I now have a great super fast machine,

something I have never experienced before and am so happy with it and all the advice and help i got from my mate, plus the experience learned.
To do it again, well not real sure, as it was a bit nerve racking not being experienced I wonder if i would not just buy a complete fully assembled machine as Glen suggested.
Don't get me wrong, I am happy with the end result, but wonder if i would let someone else do all the worrying.
Just my two cents worth.
Leon