Two things caught my eye about your need. The first being the delivery of high-speed results while maintaining accuracy. And the second being the ability to support both trypan blue and fluorescence. With that in mind I would recommend you take a look at the Cellaca MX from Nexcelom. Utilizing trypan blue it can do 24 samples in 48 seconds or 2 ½ minutes with fluorescence. I have included a link below to learn more.