First off, these things rule. The demo I was given for these in-store blew me away and they continue to do so every day. I can hear things in other people's mixes that definitely get lost on other systems and my own mixes have improved considerably. Listening to my old mixes on these was.....humbling. I think two of these is an important step up for any amateur or growing producer or engineer and can meld well with your existing setup by giving you a primary or secondary set of ears for your mixes. I produce everything from lofi/hifi beats, metal (stoner, hardcore, death metal/core), shoegaze, indie, etc. and I've noticed very particular things (hz spikes, leveling issues) in my DI tones, virtual drums, and re-amps that I now catch before pressing record (saving me a lot of time down the line) all thanks to these monitors. Note about the optional sub: I did not purchase the sub with my pair but I believe it would fill in the gaps in the low end (I understand that these can't really do it all or else they wouldn't be as flat and clear as they are) but they give you a clear picture. My solution has been to use an auxiliary system (home theater, computer speakers with sub, car) for checking the 50-20hz response until I can afford the matching sub or an aftermarket alternative.