I had the same coupon and just ended up going with a
HP Mini 110-1125NR Netbook.
And here are the reasons...
1) The model above has free shipping, windows 7, and a 6 cell battery; which came out to 374.49 with tax and shipping. The same model 'configured' came out to $416.22 with shipping and taxes.
2) The mini 311 is what, almost $459 with taxes and shipping, for that price I recommend the dm3t series laptop which has 10 hours battery life, a toned down conroe and DDR3 memory. With an online coupon (-$20) and the $299 certificate it comes out to about $290 out of pocket.
Look online for coupons like couponsdeluxe.com, you can find great stackable coupons to take added discounts off.
Also, HP is doing a $40-$60 off printers with a purchase of a PC including the mini's so I was able to get a Deskjet all in one for only $29 with free shipping.
Anyways, with the coupon I was able to get the Mini 110-1125NR and the Deskjet F4280 for $101 shipped.