So I'm going back to my original post / comment after reading what owner wants. You want simmy and calving ease -Grandmaster. I also agree strongly with Frostback. We bred four sim/ang heifers that the kids showed last year all to Grandmaster. All four calves were heifers, with BW of 64-69 pounds. Easiest calving I have ever had in my life and calves were up and bucking before mom had bags completely licked off of them. The calves are phenominal. Not leathery up front at all. They do come out long and leggy but after a couple weeks, they grow like weeds. Either I got lucky or the others who post negative about Grandmaster calves had bad luck. So I guess 6 one way, half a dozen another. I know there are several on this site with Grandmaster females not only making exceptional outcrosses to the overwhelming amount of Dream On influences, but also winning.
My Grandmaster heifers will be bred to Uno Mas (because I've seen and touched a couple this summer and they are awesome). And he is calving ease.