Hey,

Appart from a totally "fake" sense of volume, u loose stereo , also reverb sounds really detailed and lound when it's not... also u should make account for the fact that yer ears will probably get tired way much sooner with headphones that with speakers.. so they end up atenuating and enhacing certain frequencys so u get a totally wrong ideia of yer sound..

most people recomend (wisely) that u listen at confortable volumes because of this...

So headphones r good 2 sketch up a track or even struture it but final mixing/ tweeks should happen on a new day with "fresh" ears...

Also if u use hp make sure u use linear ones...

your idea on the hi-fi is preatty right but u got it in reverse.. u should use linear spks and then go back 2 check yer mixes on an Hi-fi/ car stereo etc.. get as many sources as possible... don't take the sound of any as absolutly right.. make an average... is if something sounds wrong every where then it must b wrong...

the prob with listening on hi-fi is that u r listening 2 something that has been eq'ed 2 sound a certain way (bring on the bass and the highs)... now this could eventually b ok but not all hi-fi's have the same "eq"..

hope this makes sens 4 ya m8,

Z