Sure, you'll notice a difference, but it's whether you like the
difference. I've scratched my head for ages trying to work out why
people buy good headphones/earphones, then end up going back the the
rubbish standard pair that they were using before. The answer i think
is: moving up with the same manufacturer is different to moving over to
a different manufacturer. E.g. i don;t see many people complaining
about going from a pair of PX100's to a pair of HD555's, but moving
from standard ipod ear buds to a pair of Shure's for example, or a pair
of Sony's to a pair of Grado's, is where the complaints start.
Out
of my sub 70 headphone/earphones collection, there are good and bad
examples with all headphones. for £50, protable use, i would go for the
iGrado's. if you can stretch to a little more and buy the Alessandro MS-1, not the Grado SR60.. which are a fine choice. However, the Alessandro MS-1's come between the SR80 and SR125 and retail for less than the SR60's. it doesn't come much better than that.
If you can get your hands on a pair of Ultrasone HFI-15G headphones, then buy them! I absolutely love mine, and they're light comfy and they sound very open and detailed, even with the S-logic stuff.
Consider also the Goldring DR150 headphones, however there is a slight issue. Bar the fact that the DR100 got an award from 'WHF' The detail is good, however the sound is shrill beyond belief. with some songs, i can bear them for only a few seconds, before i'm ripping them off my head. Hoever, there is a solution. Fortunately the geniuses at Goldring have made cable modding a cinch, becasue they use a good old fashion 3.5mm to 3.5mm cable. easy to change.
I tried the Goldring SR150 briefly, and they much more.... bearable than my DR50 or DR100's.
Alessandro MS-1 (home use)
Ultrasone HFI-15G (home and portable)
Goldring DR150, and change that cable!