So I live in the middle of nowhere and amazon takes forever to get anything to me and auditioning stuff isn't an option at this point. A local music store can get me HD 380, A900x and DT 770 32 ohm for relatively cheap but I am to choose between these two in advance. I mostly listen to classical...

Here's the problem. Let's take a headphone with some nasty treble peak, say the DT 990, and try and see where the peaks actually fall in the frequency range of musical instruments. Usually such headphones produce some harsh effect with high-pitched instruments such as violins, piccolo, etc...

I need close headphones which have deep cups and would have my ears comfortably sit in them without even the slightest pressure on or around them. I intend to use this with my laptop and sometimes with other portable gear. On-ear or semi on-ear headphones (SRH440, 840, V6/7506, DT250, etc) are...