I'd probably split the batch between 1728 and M-42. I did a wee heavy a few months back & split between 1728 and M-15, the M-15 was a train wreck but the 1728 turned out pretty well, O.G. 1.097 to F.G. 1.026 in about 12 days for 72% AA. I recently used S-04 for the 1st time in years on an ESB, it certainly does ferment fast, drop hard and produce a lot of esteryness, but at 72% AA was lower attenuating than the half with US-05 which hit 78% AA. I haven't tried S-189 yet but it's on my list.