A good computer with very small defects

I bought the computer in order everyday tasks (Office, Internet), as well as to play games. I do not anschaffe me the ultimate gaming computer here was already clear to me. First I would like to send in one day praise and everything was neat and well packed. After unpacking the I looked at the case and found zwie quality defects. On the one hand but rather large power button was like to hang the push in the flap and the built-in DVD burner / drive disabled it from closing, so you have to hold down the lid by hand every time closes the drive.
There is also no way (I can be mistaken on this point) to retrofit a graphics card with external power supply. The ATI does its job quite well indeed, but need a lot of games PhysX by nVidia. Because I would wish that the ATI will be replaced by an equivalent nVidia graphics card. In Windows Performance Index (Win 7 Home Premium) it reaches the Windows Aero design just 4.9 points in games and demanding applications already 6.6 points.
The processor I want to explain only small detail differences, because there are Intel 2 Different generations of multicore (i3, i5, i7 excluded)
The first dual-core version is designated as follows: Intel Pentium Dual Core E XXXX
in the second generation of the name is mentioned like this: Intel Core 2 Duo E XXXX
This computer is the first generation, but this does not make much difference. It is even possible to
Intel Core 2 Quad upgrade.

The RAM and the hard drive are very fast and everything is pleasantly quiet. The hard drive is Western Digital and the performance index reaches 5.9 points. The main memory is a dual channel DDR3 Team and reached 6.6 points.

Overall, I would like to express my very great satisfaction expressed and who is not bothered by the little quirks of the case and will not install extremely Electricity eating graphics card can access here. The price I think is very reasonable.

Addendum 24.2.12:
I want to correct myself with regard to the graphics card. I have retrofitted a Zotac NVIDIA GeForce GTX 550 Ti with external power about 2 weeks ago. For this I had to adapt to a 6-pin PCIe connector two 4-pin Molex connector on the power supply. Thus I have the necessary graphics performance for me for the latest games. The first annoying drive door can now be opened normally.

Addendum 08:12:12
I saw today that my system configuration is no longer available for purchase. To avoid misunderstandings, I describe summarize the original system configuration. The price of the system was approximately 300, including 10 shipping.

Processor: Intel Pentium Dual Core E6700 2x 3.2GHz
RAM: Team Dual Channel 4GB DDR3 1333Mhz CL9
Motherboard: Asus P5G41T-M LX2
Graphics card: ATI Radeon HD5450 1024MB (replaced by NVIDIA GTX 550 Ti)
HDD: Western Digital 500GB SATA II
other drives: DVD burner, front-Card Reader
PSU: 500W No-Name
After installation of the nVidia graphics card no longer plugs were free to eg connect an additional internal hard drive.