The new BORG which opened here in Aurora on Tuesday has a dado set by
Milbro (?) for $100 and a Freud set for $150. Is it worth it to spend
the extra $50 or am I being a cheapskate?

Depends on what you will use the dados for. If you want the cuts with little
chio out and a reasonably square surface, then yes you are being a cheapskate.

Spend even more and get the Forrest, far superior to Freud's. No chipout.
Square bottoms.