Did you see Sunday's Extreme Home Makeover Edition? The emotions were a little over the top but it's amazing what they did for that Indian reservation.
If you're not a hard core gamer I would definitely order it, the 3 year warranty is nice. Back in the day (a few months ago) $467 for the 1905FP was considered a VERY HOT DEAL. If I didn't already own a 2005FPW, I'd seriously consider dual 1905FP's.
If you pay for your new laptop with an eligible VISA credit card you'll receive a FREE 1 year extended warranty. Or if you pay using DPA you'll save 2% but no free 1 year extended warranty. Which of those would you choose?
If the specs and price are very similiar then I'd go with Dell educational discount.
Will you be paying for this with a VISA, MasterCard or Amex credit card by chance? If so, which one?