Probably my listening time is distributed evenly between headphones and my speakers system. at the moment i am still loving the addition of a valve power amp in my system. Its by no means high end, and has some noticeable flaws, but it is still leagues ahead of the technics amp i was using.
my speaker setup (complete chain) is this.
Source (ibook>usb dac, nano, dej2000 or linn sondek Lp12 with Grado Blue>cheap phono stage)> Mint Amp with 200ohm on output> Maplin Millenium 4-20 push pull AB1 power amp (20W, mullard tubes)> B&W original 601, Noname diy sealed 8" sub x-over at 50htz.
The difference between headphones and speakers is mostly presentation, aside from the feeling of bass impact i get from this setup (which i do get, both chest thumping, and deep and tunefull). When listening to speakers, they present an image of sound in front of you. when listening to heaphones sound surrounds you the music, you are much more enveloped in sound.
i much much prefer my speaker setup, and my setup is by no meant optimal in regards to placement, its just a much more visceral experience. i cant wait to get a place that i can really get the best out of my system.