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If you go for the 08 model (no it's not outdated), I would @ least upgrade to 4gb of memory.
 
For the money the '08 3.06 Ghz 24inch is great value from Macwarehouse.
We needed a second computer and wouldn't pay Apple's prices on the new models. My exisitng 3.06Ghz '08 model is fantastic and I feel no need to buy anything faster... as a result I've ordered an '08 3.06Ghz from Macwarehouse.
 
Top of the line 08 all the way unless you are willing to get the top of the line 09 which isn't much of performance in day-to-day except gaming 😀
 
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