i value fast typing over any other factor when i buy keyboards and ive gotta say that once you learn to float/touch type browns(dont button out on keystrokes), theyre the fastest ones for me at least, and ive tried every cherry MX switch except whites and greens. however the feedback feels much less prominent than in blues so blues have a shorter learning-curve if you wanna learn how to float type on mech boards, maybe it would be worth buying a cheap blue board like the one from razer and get used to utilizing the tactile bump and then get a CM or filco with browns? thats what i did when i switched from reds to tactile for typing purpose.
browns are some of the lightest cherry keys (it can vary much on what board you get though, my ducky shine with browns felt like clears, heavier to push down) and theyre tactile, so its very ease to reach the activation point with just a small tap of the finger, but theyre also very easy to bottom out due to their lightness and (imo) small tactile bump.