Streams are probably 70% of the powerhead sales. The classics are up for cancellation every year but they remain because in many tropical climates they are just enough of an advantage to prevent the need for chillers. We probably sold 50 classics last year in the US. The classics have one big advantage besides the heat, it is probably the only powerhead you will see that is 25+ years old and still works, I repair a lot of very old Classics, they are a good value for store use as a result. On the other hand they are a bit noisy and require a fair amount of mechanical skill to rebuild. The Turbelle Electronics are the majority of non Stream pump sales.