hi guys,
thks for your valuable advice.
hm, i think u guys are right. i'll have to hang on for a while, and save some money, probably save for the 80-200mm f/2.8 G lens. (~2K++?)
reason why i was thinking of upgrade is, whenever i enlarge my print to ~ 8x12, found some color abberation. probably a APO lens will correct that.
anyway, lens are investment, i got to save for the best!
thks guys...