DWS780 is on sale now for $349 + Free Shipping. from Home Depot.
https://www.homedepot.c
I was checking the previous frontpage deal, but did not buy it because someone told the modification on DWS779 might void warranty.( )
Now Home Depot has a special buy for DWS780 with $349 price, so I combined with Ridgid Miter Saw Stand ( )
Cheaper (considering modification cost) and no worry for warranty.