Hello,

I checked the Toshiba website and the specs are pretty good.

You can check this reviews from users (but nort much).

http://www.productreview.com.au/p/toshiba-satellite-l850.html

It seems that one of the guys was able to upgrade for 8g without breaking the warranty.

If you go for an extra 4g, check if the W7 is a 64 bit version

Good luck