I had two Delta Q3s for many years and was very pleased.  The only reason I don't have them any more is that I retired and moved cross country.  I didn't want to lug 2 heavy 10-year-old saws, so I sold one, gave away the other.  Once I got settled in, bought an Excalibur EX-21.  Love it.

In summary:  I liked my Deltas a lot, except the blade changing was a pain.  Changing blades in the Excalibur is a breeze.  Customer support for both Delta and Excalibur - top of the line.