Well, the OP does have the current slow PC to fall back to if something goes wrong.
I used to hate laptops until my current job (cad, design, etc)... where that is all we have with external large monitors and keyboards.
At first I was like "Why laptops", then you have to take the laptop home or to a job site and you realize how convenient the laptop really is.
And I think this is more true now than it ever was as laptops have become viable desktop replacements (power, size, battery life).
Edit.. looking at those MSI laptops again, I did not realize they had multicolored keyboard lighting. That's not exactly businesslike. Hmm.
Ok- business mobile workstation.
What about a Lenovo Thinkpad?
The ThinkPad W Series has "NVIDIA Quadro 1000M Optimus Graphics technology (2GB)" which is a powerful work graphics card.
And adding on site warranty is like 55 bucks.
http://shop.lenovo.com/SEUILibrary/c...0F26CCAC867854