Urgent Advice - 24inch iMac or New 20inch

[U.C.]

I have been waiting for a year for the new iMacs to be launched, and well was kinda disappointed when I saw the Radeon 2600 Pro benches. Now my Computer Guy(we don't have Apple Stores here) is giving me a option of either a 20inch Alu iMac or 24inch iMac. The price for both is same, and they both are in the standard configuration.

 

The only thing is that the 24inch is of course the older model, but it has the 7600GT, which I have read is faster than the 2600 Pro. Also both are new and come with standard 1 year warranty and stuff.

 

So what do you say??

 

I need to tell him tomorrow, so I am kinda in a hurry?

 

EDIT: I checked and turns out it has the 7300GT, which I guess is worse than the 2600 Pro.