I'll definitely vouch for the platinum delights also, I love that plant. I took a bag over to share with a buddy a few weeks ago, and he called it alien weed, he thought it looked crazy. Rock solid, purple buds coated in big fat trichomes that are just loaded with tasty terpenes.
So far all the GSC crosses I've seen have been lower yielding but many look really dank. Both the platinum delight and the Sinmint have super dank phenos. I think I'm safe saying that if you run one pack you will definitely find something worth keeping.
So James I showed you my Sin-d snacks. I put the last seed mother into flower a few weeks ago now, and its definitely Sinmint dominant. Shorter tight nodes, looks like it might actually yield pretty decent. The branches are super sturdy. I'll get a pic with my next update.