As far as my experience is concerned, the graphics card drivers tend to give problems, irrespective of nVidia or AMD. The Intel solutions are stable, heat up a lot less and get the job done, in case you are not into some serious graphics processing.
The wireless card may be another issue, Broadcom support has recently been built in into the kernel, but out of box support is still not there(you need to download the firmware, which is proprietary). Rather, go for an Atheros card, which has much better support.
The rest of the hardware should not be an issue.
Had experience with a lot of machines, including Dell, Acer, HP, Asus, MacBooks as well. Have found the systems with Intel graphics to be most stable and usable. One particular system you may want to look into is Dell Vostro, though am not sure of the Wireless Card in it.
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