wasn't nicole the first one to go solo?
or are duets with other singers not seen as solo-going?
if not then hmm ... i think nicole, because she seems to be very popular right now, maybe because of SGB
but if you look at their vocals, i would say seungyeon, because she has a really pure and strong voice and can sing perfectly high tones ... i love her voice!
but i would appreciate all of them to go solo
and i think hara would be the one, who wouldn't go solo .. no matter how much i like her, she just don't have the voice for an solo artist, has she?
anyway now that i think of it, wasn't from SNSD taeyeon the first one, to go solo? since she had the strongest voice, so i think seungyeon will be the first one (because her voice is strong too) and after her maybe nicole, because of her popularity and THEN maybe gyuri.. ^^ she has such a smooth voice .. it would surprise me if she wouldn't get the chance to go solo