Best Jack the Ripper cross

Just looking to pick up some TGA subcool varieties, and take advantage of being in a genetics lab to look at microsatellite markers and genotyping strains.

Was wondering what everyone's favorite Jack the Ripper cross is.
I'm thinking Jack the Ripper crosses because of the likely high variability in loci due to all the different varieties that went into it, and the potential to trace rough phylogenies among related varietals.

Thanks for looking!

Pandora's box!!!!

Just got my hands on Sannie's Jack F6. It made it into The Big Book of Buds Vol. 4 & some of the colas they were pulling off of the plant in the pictures were the size of people's forearms. Heavy yielding & a great stone from what I've read. It was relatively cheap to purchase as well!