I would say don't go with the saddle at all. Lowe's carries these great slip on fittings that just slip on the end of your pipe. They work on copper, PEX, CPVC, etc.
Just cut the section out, slip on your fittings...done.
I was only able to find brass reducer nipple to connect the 1/4 inch hose form my DI, but it's before the DI so there should be no worries.