So after asking a few questions around here I went ahead and pulled the trigger on a pair of AKG K271 MKII. They came today and I'm going to burn them in a bit but my immediate reaction is they just aren't efficient enough for my use. My situation is I currently have no desktop or dedicated rig. I only have my iPhone. That may change some day but for now I need a pair that I can go from room to room in the house without an amp. The 271s are CLOSE but most of my newly recorded music is at a decent listening level with only 2 clicks of volume left on the iPhone. Older or softer recordings completely max out the iPod. With my AKG Q460s half of the volume level is LOUD 3/4 and up would be unlistenable.
So, my question is, what full size, ideally sealed can, is more efficient? My preference would be mostly neutral but leaning towards the warm side if need be. Bass... I want it to be there, but balanced. Even the AKGs have good enough bass for me. A smidge more would be welcome but I'm not a bass head and I want it to be tight, not boomy. Budget is ideally $200 max at amazon. I'll entertain options up to $250 if they are going to be something special.