[ubuntu] Dell XPS 15 / HP Envy 14: which works best with Ubuntu?

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http://ubuntuforums.org – I'm going to buy a laptop, and I've been looking at these two. Both seem to have compatibility problems, some more serious than others and some more solvable than others. Which one is the safer bet? I'm not going to use it for any really heavy duty stuff. No games, but I need to be able to use an external monitor. These are the exact specs in my case, in case it's relevant: Dell XPS 15 Processor: Intel Core i3-2310M, 2,1 GHz Screen: 15,6" (1366 x 768) RAM: 6 GB Hard drive: 500 GB SATA (7 200 rpm) HP Envy 14 Processor: Intel Core i7-720QM, 1,6 GHz Screen: 14,5" (1 (Hardware)