i bought my iMac about a month ago so it's not really possible for me. besides, i'm not feeling buyers remorse on this refresh, aside from the gfx boost (not the card itself, but the 512mb to 1gb boost of ram) the changes don't concern me.
i've not yet managed to make the 2.8GHz i7 sweat, and the ssd option is so far out of my budget it's not funny.
the hassle of being without a computer while it gets replaced is just not worth it. having said that, if it develops a noticable yellow screen issue, i will be asking for a refund, at which point i'll go out and buy a refresh.