Amazing that you purchased these in January 1970 according to your review!

o__O i really didnt set that, dont know why..
edited thanks

400 dollars?

Mistake again edited thanks

how do you like your gr07's compared to your ex1000's and w4's?

@zachchen96: about quality of the regions
Bass: W4=GR07>Ex1k
Mids:W4~Ex1k>~Gr07
Treble:Ex1k>~W4>>Gr07
Airy: I dont remember exactly=.=
Detail:Ex1k>~W4>>Gr07
Fun/long-time listening enjoyable: W4>>Ex1k>Gr07
Note: = is on par, >~ is slightly better,> is better, >> is significantly better
To me, each of above iems has an own strength. the Bass on the GR07s is deepest, most solid and most quantity but the W4s is fastest, tightest and cleanest(the Bass on theEx1ks can go deeper than the W4s too). Sound on the W4s is fullest(like a headphone-that i have never heard before on an iem). The Ex1ks have an unique "wet" mids, not like the W4s and Gr07s have a dry and crisp one, that like zzzzz at the end of words of the singers pronunciation. I dont know how the Sony engineers tuned this thing for the Ex1ks because the Ex1ks have most treble of 3 iems.
And this is my preference rank: W4>~Ex1k>Gr07
sorry for my bad english!