My vote would be purchase it new from a local authorized dealer.
You get to try it out first. You get a 3 year warranty. And you get local help if you need it.
That being said, I think there is a possibility of any power tool going bad. Might as well go for the one you really want.
The Kapex has so many features and benefits that are unique to the saw. It's really a treat to use. I see most of the Festool items I have as something that makes the work more enjoyable to do and the potential for accurate, repeatable results.
I also think that's a good plan to power it off it's own circuit. At first, I ran mine through the CT26 for convenience. Then I noticed the saw changes pitch when the vacuum is on. The lower power could be causing some of the motor issues.
Now I have a BT remote(thanks wifey) and I run the Kapex on it's own circuit. Now it makes the sound of plenty of power.
