GeForce Go 7900GS vs 7900GTX vs 7950GTX

[vaio-fx]

My laptop (Dell XPS M1710) needs a new video card I'm stuck between which of those 3 above to purchase. I probably won't go for the 7950 as I don't think its thats much better than the 7900GTX. So its more between the 7900GTX and GS. I can get a brand new 256MB 7900GS off ebay for £170 and a used 512MB 7900GTX for about £200. Both of these cards like to burn up easily so I'm worried taht if I get a used one this may happen quicker. However my laptop has 1920x1200 screen and I would like to play games on it, I think the 7900GS would really struggle at this. What do you lot think? Thanks

 

[dude_56013]

Um, how exactly are you planning on changing the video card in your laptop? I've heard it's near impossible.

 

[vaio-fx]

In the Dell XPS M1710 its even easier to swap than a desktop card. It just pulls straight out (I have taken the old broken 7900GTX out) and you can get replacement cards on ebay. It looks like this http://www.epartsandmore.com/images/web_images/ebay/GU067.jpg