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Buy it now if you're not interested into having the latest GPU or an SSDs option from Apple.
The CPU can't get any better (see Intel roadmap), USB 3.0 will happen next year (thanks intel), RAM can't get any better (16gb), displays can't get any better (IPS+LED already), design will stay the same at least till fall 2011, so what are you wating for? Nothing....

Plus, if the update happens in October, you loose 5 months of iMac experience and you will feel stupid when, after 2-3 months, the lightpeak/USB3.0/SATA6gbps/SandyBridge revolution happens.

101% agree..
 
WOW, I just purchased my iMac 27 i7 and have not yet opened it.
After reading this, I may return it and get the Macbook Pro i7 17"
 
if you already have a mac which is no more than 4-5 years old, then hold off until the next hardware update (maybe in fall?).
 
recent leaks regarding macbook, air & iphone cast doubt on an imac 21.5 update in june.

my mbp melted 2 weeks ago & i WAS waiting for a june update, hoping for an i5 imac 21.5 inch. not so sure now...

what to do? wait a few weeks now with slim chance of an i5 imac? or accept that it will be later & just go with a core2duo 3.06 ?

i can wait a few weeks, but not longer. im browsing on ps3 right now ... cant take much more of this ~ ha ha
 
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