There is no right or wrong.
My two picks:
HFM HE-500 - speaker like sound stage. Covers all music well, but #2 can handles classical better. My mods: fuzzor, MrSpeakers Ether Angled pads, rear screen off, Black Dragon cable, Dynamat/Sorbothane. Cost used: $370 (mods: $150)
Senn HD-600 - great honest timbre. Cost used: $160. Driven with a BH Crack the bass goes down to 30 Hz strongly, very quick bass. My mods: Dynamat and felt (< $5). Prefer stock pad. Custom Cables from UK costs about $120, better than stock, but not necessary.