@HipHopScribe, the older series, before i-series may be considered a little bright. However the 60 was gorgeous and I wouldn't call it bright. The SR80 was a little bright. The 325, 325i, 325is were meant to be the brightest headphones of the SR - Prestige Series.
However the new e-series is clearer, weightier, and many say refined in brightness. I owned the SR125i, and I loved with a passion. Even when it temporarily went a bit weird and had to go back. I had to fight with myself to return it. I have the 225e now.
The brand new SR80e which was originally a touch bright in original form years ago should be auditioned. Apparently now it is an unequivocal choice.
More importantly though I don't want to get drawn into an argument or discussion about Grado being possibly bright. I don't mean that offensively and I apologise sincerely if it's taken the wrong way. The reason is because it's a matter of personal taste. Either you like Grado or not.
What I suggest is that you take you ZX1 to a Grado dealer. Listen to at least the SR60e will they will for sure have on display. Find out that the Grado has at least fifty hours run-in time on it, because the bass fills a bit in during that time.
@fiascogarcia as well,
What stands out from this though is that you're both mistaking a little treble as impossible to have warmth. Grado have a rich warm tone, and a few small treble peaks in their frequency response (FR). They roll off under about 50Hz so lack sub-bass which the big Sennheisers have. However this is not end of game. They have the same low end FR as many top quality £500 speakers, so don't be fooled.
Check out the What Hi-Fi review of the SR325e. http://www.whathifi.com/grado/sr325e/review
It states quite openly, that the 325e never becomes bright or hard edged. What Hi-Fi also say the 325e £280, is the best headphone before you reach the Shure SRH1540 at £430. (Which is their next 'best in class review'.) Most reviews of the 325e headphone are stunning.
If you want to see FR graphs of headphones go to http://www.headphone.com/pages/build-a-graph
Edited by GreenBow - Yesterday at 4:55 pm