SW Cashmere is a good alternative to Duration
The low-lustre has slightly less sheen than Duration matte, and the medium-Lustre is just less than Duration satin... Covers a little bit better, and 1/2 the cost of Duration. While they claim it drags less for less painter fatigue - my guys haven't noticed the difference, but it does flow out better than Super or Duration Home.
Just easier to mark up a $18 gallon than a $34 one!