The tire guy you spoke with is 100% right. Besides looking stupid, it is a bad
idea to mix and match different brands and tread patterns. I've never leased
a car so I don't know what they would say when you turned the car in with
miss-matched tires. My suggestion, forget about saving a few $$$ and buy a
set of tires that match.

If your goal is to save a few $$$ you might want to look into a set of
Avon Tech M500. Using Tire Rack prices from a few months ago... they
are $666.00 + $80.00 (for road hazard insurance) = $746.00 a set.
The road hazard insurance is only an option.