I've generally had decent success with the Fermentis lager yeasts mentioned in the subject line (I've yet to try S-23), but my LHBS has them priced in the mid $8's per pack at present, whereas Label Peelers presently has Diamond Lager on sale at $4.97 per pack combined with free shipping. I have a Dortmunder Export on deck and was going to use S-189, but I always pitch 2 packs, and the $4.97 with free shipping price for the Diamond got my attention at only $9.94 for two packs. And now I'm having second thoughts. I've never used the Lallemand lager yeast. Should I bite the bullet and buy the S-189, or go with the Diamond?