Gateron Black Ink V2 linear switches are one of the community’s most favoured switches to date, seeing use in an enormous number of builds from the average enthusiast up to professional streamers and e-sports competitors. They sport a proprietary plastic mix not seen before in Gateron’s switches, which has helped the switch become well-known for its stock smoothness and bassy accoustics. They also have matching black springs, which have little spring ping on stock Ink switches.
Lubed, Black Ink V2s are pretty hard to beat in terms of smoothness and sound; we would recommend Krytox 205g0 on the housing and stem, with GPL 105 or GPL 106 on the springs. The Ink housing is also incredibly tight, and have found that 0.125mm TX films are some of the few types of films that will fit.