Aero 15 vs. XPS 15

Why is buying a new laptop so hard? LOL! So - replacing my Alienware M17x beast, want something light and with a long battery life (I'm on long flights and in airports a lot) and my most demanding application is amateur video editing (Premiere Elements but mostly Cyberlink Powerdirector.) So I need a quad core cpu.

I had narrowed down the to XPS 15, but the horror stories (see for example...

Aero 15 vs. XPS 15

Aero 15 vs. XPS 15