I mostly listen to classical music and do a lot of gaming id prefer if they were under $40
The monoprice are very nice for the money. I really like the sound and the replaceable cable makes for a nice touch too, The build quality is plasticky but seemingly durable, time will tell as I have only had them for a couple of weeks. I think you would be pleasantly surprised with them.
Where are you located? At 40 you can get a better set then those mentioned.
If in the US.
These are much better sounding for your Classical Music taste as well. Soundstage isn't as big as the Superlux but on par..