farmerboy,
Unless you're getting a smoking hot deal on the D28700 such as less than $150 delivered, then you definitely want to at least take a look at the D28715 chop saw at Home Depot or Lowes, etc. I was at HD today picking up supplies and wandered over to the tool isle to see if they had the D28715 chop saw on display and they did. From what I can tell, The D28715 has all the same features and more, including 1.5 more hose power (D28715 = 5.5 HP vs D28700 = 4.0 HP), a slightly larger diameter cutting capacity, a slightly faster wheel speed, a slightly wider base for improved stability and it offers tool-less wheel changes. I'm a huge fan of tool-less blade / bit / wheel changes on any tool, so I really like this feature. If I didn't already have a decent chop saw, I'd put the D28715 in my list of chop saws to consider.
Here's a quick summary of these two chop saws directly from DeWALT...
DeWALT D28700
http://www.dewalt.com/us/products/tool_detail.asp?productID=10604DeWALT D28715
http://www.dewalt.com/us/products/tool_detail.asp?productID=15458