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Question: 2.0 ghz vs 2.4 ghz does it really make a noticable difference...?
Document: If you ARE planning on buying the version with Core 2 Extreme please know that it is a DUO chipset not QUAD. It has 2 cores, not 4. The difference in speed is only notable in certain applications such as games and advanced 3D apps.This iMac is beautiful visually. The "skin" really suits the system well. The black Apple logo in front and on the back make it look more stylish than it is.
I was very pleased with the 24" iMac 2.4 GHz Core 2 Duo. It's an awesome computer that does just about everything the average and "prosumer" customer might need. It IS big, though, which is why I sold mine and switched back to a MacBook.My advice is to make sure you have the space for this beast, because although it's gorgeous and powerful, it's also rather large and requires a little breathing room.
I got it and am really happy with it so far. It's pretty sleek and you get the latest iLife installed along with a lot of other upgrades with the new IMacs.I am not that excited about the Aluminum + Glossy features of this update, but I am impressed with the update to include 2.4 Gz processor, 802.11n wireless, Bluetooth 2.0 and Firewire 800 port in the basic IMac.
I'm new to Apple and am switching over from PCs. I recently  got reeled in with their iPhone and their iPod, and then now this iMac - it really surprised me. I had to have one. So I bought this 24" 2.4 Ghz and bought an additional 1 GB of ram before leaving the apple store.I installed the extra ram (very easy) before I even powered up the computer for the first time. This is quite simply the coolest computer I've ever owned.
Somehow, I don't feel that way this time around.Even though my new 24'' 2.4 Ghz Intel Mac is outfitted with the maximum 4GB of RAM, speed and productivity gains seem incremental. Not that it's a snail. It's just...not that impressive, as upgrades go.
Who needs Linux when you have the Mac with OS X.The iMac is sleek and sets up in a jiff. The 20" screen with the 2.4 ghz is a great combination. This machine can multitask. I was able to import 6400 photos into iPhoto, while downloading firefox, and installing iWork, Notebook and a few other programs.
Apple iMac Desktop with 20" Display MA877LL/A (2.4 GHz Intel Core 2 Duo, 1 GB RAM, 320 GB Hard Drive, SuperDrive)This is an outstanding computer, any way you look at it. Beautiful, elegant, blazingly fast, very stable OS, large screen with excellent resolution and colors, and minimal desktop footprint. Easy memory upgrades.
Apple iMac Desktop with 20" Display MA877LL/A (2.4 GHz Intel Core 2 Duo, 1 GB RAM, 320 GB Hard Drive, SuperDrive)I first ordered the Apple iMac Desktop with 24" display, but it was too BIG for my use and for my desk. When Amazon refunded my purchase price, I then ordered the one with the 20" display. It is just right!
Lockups were common and there were even occasions when the computer would just turn off out of nowhere. I finally had enough of the PC nightmare 2 weeks ago when the computer simply would not open Word nor could it print the important document that was needed right away....that was the last straw...I was getting a Mac! !Now that you've read my diatribe, to the good stuff we go. I bought the 20" iMac with the 2.4 GHz processor.
I've purchased computers from both places, most recently from Amazon. The latter gets my business once again.As for models, unless you're a professional photographer or planning to use your computer as a substitute for an HD TV set, 20" is more screen than most of us need. The 20" with the 2.4 Ghz processor, 320 Gig hard drive, and better graphic specs--even though it's 300 extra--gives you practically the same specs as the 24" giant-screen models.
Answer: Not really.  If you are browsing the web and word processing I would go with 2.0 GHZ.  I would use the extra money to buy the extended applecare or add more memory.