ok everyone seems to like two websites or other things on one display ,
but then if you need more things open you still have to put windows in the dock so whats all the fuss about , i dont have to

i have only a 17 inch iMac plus one external 17 inch monitor connected via mini dvi and another 17 inch connected via usb using a usb graphic adapter
and my iMac G3 700mhz
all i need at the moment here in uk , but as i soon go back to germany beginning next year there are waiting
12 Mac's for me which i shipped over already ,so absolute no problem to display at least 14 websites at once side by side and still space for the odd app like photoshop
and none of my apps would require a i7 processor as minimum requirement
not even photoshop or final cut ..they dont even ask for a intel
i have no problems opening multiple apps at once , so what i did want to say i would rather go with the 21.5 iMac and add another 21.5 monitor via MDP and another 21.5 monitor via a usb graphic adapter if i really would need more screen space and a new iMac..still cheaper if you dont require a i7 for gaming
hmm i had to ,i switched to mac and did want all of them from 1997 onwards at least and i dont believe in displaying them only , they had a been build for purpose to they deserve to get a purpose ,and one Mac feels so lonely they need company