Hello StealStick00,
The Acer has 2 GB of ram and twice as much HD space. There may be good things about the Dell, but the extra RAM of the Acer is a pro. The $50 should buy an extra 1 GB of RAM (Dell asks $125 for it). Dell also offers to double the HD for +$25 to 160 GB.
It's not completely clear what you get with Acer though, there's a product sheet on Acer but that's another spec.
Acer also seems to offer a larger display (17", Dell only 14.1).
I'ld go with the Acer for the things you mentioned: more RAM and comfort of a larger desktop.
Edit: typo.
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