Got these before my wife physically dragged me out of the venue to prevent me from buying any more ;)
Group pic above, and here are indiividual shots, filenames are the name of each plant:
The last two photos are both mammilarias - kinda neat how varied they can get within the same genus :)
You could've told me the last one is L. williamsii var Caespitosa and I wouldn't have questioned it!
Are the first two's larger broad leaves/spines flexible or are they rigid like a typical spine?