I would go with the less expensive Acer laptop, it's specs are similar to that of a HP laptop I had recently which used vista and was great for office and videos. I've worked on a few Acer laptops so far, and from my experience they are very reliable (I had to do some work involving reinstalling the OS, so no hardware problems). One of the schools I went to had a lab of Acer laptops and hasn't had to fix or replace any of them in the three years they've had them.
Core i7 2600K @ 4.2GHz | Corsair H100 w/ Scythe S-FLEX 120mm Med. Flow & AC MX4 | 4 x 4GB Corsair Vengeance PC3-12800 | Gigabyte Windforce 3x OC HD7950| Asus P67 Sabertooth | OCZ Vertex 3 120GB x 2 (Raid 0)| LG 22X DVD+/-RW | D-Link DWA-556 | Corsair TX 750W | Coolermaster Cosmos 1000 | Windows 7 Pro 64-Bit | BenQ EW2730V
3DMark11: P7402 |3DMark Vantage: P27054 |3DMark06: 25499