Previously I bought 120mm Scythe Kaze Jyuni Slip Stream (1900rpm) (25mm width) And most of them have broken after year or two. Several are still working.
Now I use Delta AFB 1212ME (38 mm). Delta has better static pressure. I use the "rule" one GPU - one additional fan.
I also thinking about the replacing of all 120mm PC fans to 300mm fan (It looks even cheaper and seems gives much better cooling) but it needs serious rebuilding of my GPU-rig case