Overrated - Grado sr60. Aggressive sound signature with narrow soundstage, uncomfortable foam pads.
Underrated - Philips shp3000, Dynamic deep bass with smooth mids and no spikes, sweet natural highs, good soundstage, semi-open, very cheap.
Philips shp5400/5401, airy soundstage, very clear mids and highs, fast and quite deep bass.
Philips uptown, strong and deep bass, nice warm mids, clear highs, wide soundstage for closed headphones.
Yamaha hph200, very detailed, fruity, lively and balanced sound, very clear across the frequency spectrum, good bass for open cans.