They have used an AMD processor, I would always recommend Intel. Couldnt really advise you on the overall value proposition. (Also in my opinion the case is HORRIBLE!)
If you are price concious then I would recommend building one yourself. You will save money and also (crucially) you will be comfortable with upgrading parts (e.g graphics cards, extra hard drives etc) as and when you need them.
I would recommend OCUK, they sell individual components and also pre-built PC's as above. They also have a very active and helpful forum, if you were to post on the forum with your budget and requirement/ expectations, then forum members will be able to suggest which components to go for. I believe that they will be running some black friday sales.