Dell :: Quadro NVS 160 M Vs Intel Graphics Media Accelerator 4500MHD

I have Dell Latitude D820 with NVidia Quadro NVS 120M, but its causing failures, probably NVIDIA GPU. There are vertical straight lines on the screen, sometimes it won't boot at all, sometimes it would go dark screen and never start... etc Its been approximately 2 years since Ive had it.

Im planning on buying Dell latitude E6500.

I have the following questions:

1) Most people's reviews about E6500 are very disappointing, is it really true that E6500 is worse than the D820 or D series laptops in terms of build quality and hardware failure problems?

2) Considering Im having trouble with the NVidia GOU (probably) and that some people have witnessed GPU failures in Apple Macbook Pro (which uses 9400M and 9600M GPUs) and E6500 uses 160M (9300M GPU), so its a 9-series GPUs failing. Should I consider having Quadro NVS 160M in E6500 or I should avoid it and get Intel's Graphics card for now?

3) How much performance affect is there if comparing NVS 160 M with Intel Graphics Media Accelerator 4500MHD ? regarding the basic 3D simulations, such as using Macromedia Director or Studio Max, or games? I mean to ask, is Quadro NVS 160M really worth it?