Shaun, I would recom

 Shaun, I would recommend having a tower built to your specifications.  I used fry electronics and they’ve done a great job and was very knowledgeable as to what I needed.  For around $1500.  I had a tower built with a Intel I=7 quad core processor.  With one 10,000 RPM C drive and two 1-tb 7400 drives.  With eight gigs of RAM.  When you get ready to upgrade your software.  I would recommend Adobe’s premiere Pro 5.5 suite.  There is nothing worse then to always have to be waiting on your machine to catch up.  Good luck