[Help] Choosing a workstation for 3D rendering

Hello

I read the rules to this Forums and I don't think I violate any of them (and if I do I apologize).

I am in dire need of an upgrade and could really use help with choosing the hardware. I am a design student in Germany and work mostly with Adobe software (Photoshop, Illustrator, InDesign and Flash, also Premiere and soon AfterEffects) as well as Maya. Later on I will learn 3DSMax and Mudbox.

Most of the 3D stuff I do right now is very amateur but as we learn new stuff I want to do more complex projects.

Right now I have an old Intel Core 2 CPU 2.4 GHz and 2GB of very old RAM.

My budget is somewhere between 700-1000€, I need it with Windows already installed and I don't need a monitor.

Here is what I was looking at:

http://www.notebooksbilliger.de/pc+systeme/hewlett+pack...

http://www.notebooksbilliger.de/pc+systeme/lenovo+pc+sy...

also similar builds from this website in the same price range. I would prefer to buy my computer there because a) their prices are fairly low and b) they offer monthly payments (like I said: I'm a student).

I know these don't have dedicated graphics cards, I would simply put in the one I have now (AMD Radeon HD 6800) and later when I save up some money switch to a quadro or a firePro.

Am I looking at the right hardware? What should I watch out for?

Thank you in advance!

Michal