I've tried playing SC2 with both Topre (HHKB Pro 2) and Cherry Blues (Das S Ultimate). Both are good and fun keyboards to use, especially because they have low resistance. If you have a high APM, you're probably spamming keys and with a lower resistance your fingers don't get fatigued as fast. I average an APM around 160~, and my personal preference is the cherry blues. The clicking sound, as weird as this may sound, keeps me completely zoned into the game and helps with my focus. With regards to my key letters, I have the blank set so I haven't had any issues =) (However, I just installed the black on black keycaps...so we'll see how that goes)
However, my friend who owns a Filco with cherry browns stands by his choice. I don't think he's tried any other keyboards, other than rubber domed ones. You'll also see that a popularity rose in the e-sports mechanical keyboard market when FruitDealer won the 1st GSL and lifted up his Filco with browns.
Related image from GSL Season 2: