Well, this is below the price range you indicated, but might I suggest the Thinksound Rain? As it's for your gf, it's a very nice looking earphone to give as a gift, I think(though you said she may be buying it), and it is well liked by the admittedly few here who own it. They are also supposed to be comfortable(I'd shy away from the TF10 for this reason), especially because they are quite small and girls tend to have smaller ear canals in general, I believe. If shes a bit of a treehugger like me then the environmental consciousness helps too
They apparently have a nicely wide and 3D sounding soundstage, and width the wood housings sound very natural(pun
so intended). It also just seems like it would be good for her genres, given the emphasis on the mids, the sparkly but smooth/non-fatiguing highs, and the slight midbass emphasis for bass guitars.
Keep in mind thats only my impressions from reading stuff, I don't know what they sound like personally.
I am loving my Panasonic HJE900s(made of cubic zirconia, it's like a jewel!), but given that so few places sell them, that sounds like it might be expensive getting over to Aus, which is why I didn't rec them. I also think your gf might just enjoy the rain's sound signature though.