I've owned two Coolpix, the 800 and currently the 995. Great cameras.
Hard to find the 4500 at this price elsewhere. Walmart advertises the same price, but OOS. 645AF has crappy resellerrating, but 339 four-star reviews at pricegrabber (go figure...)
Rebate does not include the 2100.
The 2000 is available at NewEgg for $7 more...but it's free fedex, so that will likely offset the cost.
ibuydigital has the 2500 for 228 ($178AR). I bought my 995 from these guys, so did a friend of mine...decent place to shop. You could save even more going with Digital ETailer or Butterfly Photo, both of which have quite a few decent reviews at pricegrabber.