#2 and #3 are a bit tougher, as you're right, the 2408 is new and untested/unproven, versus the 2407 well proven track record. Since you stated you aren't gonna use Display Port, are there any other new technology the 2408 has? If I recall I don't think. So I'd probably go with option #2. Call Dell and see if you can get $100 off. Of course, if that fails (might get an agent who just finished with a cranky customer and is in a foul mood), cancel your order for the 2407, then re-order it again at the cheaper price.
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