Beautiful review man. All you guys do a great job in helping us nOObs out with where/how to spend our money. I agree about the red bore tip being the best of the bunch but for me, I had to order the spin-fit super large ass size to fit in my ear canals since they can accommodate a damn ferry. Regardless if Beryllium or not....these things are freaking amazing for the money ESPECIALLY if you get them used like I did from a user on here. Also, my Cayin DAP powers them effortlessly and I never ran into any problems with them being underpowered with either the 3.5 or 2.5 balanced connection. I ordered the tripowin 2.5mm balanced cable for these and couldn't be happier. Cheers.