iMac 24" 2GB RAM Upgraded VRAM enough for Aperture?

The 24" iMac with 2Gb of Ram and the nVidia 7600GT with 256mb of VRAM would be fine in most cases, unless you're shooting with a Canon 1Ds MarkII.

The problem with this machines in expandability, very limited. I might be a problem in 1 or 2 years time when newer cameras or versions of Aperture will demand more power.

For the price is a great machine.

It's probably the second fastest machine you can get for Aperture -- second only to a Mac Pro with an ATI x1900 graphics card.

Can someone tell me if the iMac 24" with 2GB RAM
upgraded video card and CPU is enough for Aperture?

Unfortunately "enough" is an open ended question when heavy graphics apps are involved. There is no sharp line above which performance is acceptable for everyone and below which performance is unacceptable for everyone. Basically, the stronger the box and GPU, and the more RAM on board up to 8 GB (today) the better Aperture's or Photoshop's performance will be.

There are folks with harsh workflows on this thread who have loudly complained about Aperture on iMacs. Many others with
lesser boxes consider performance fine. IMO in general an iMac or MBP with 2 (preferably 3) GB RAM is adequate today, but heavier users like me will feel RAM starved as time goes on and the OS/apps evolve to suit newer stronger hardware.

Personally I consider iMacs poor choices for desktop heavy graphics apps usage. They have the limitations (RAM in particular) of laptops but without the portability.

- Allen Wicks

For my use it works very well. I'm a low-end prosumer I guess. I shoot JPEG, not RAW. Nobody pays me for anything I shoot. I use Aperture in my spare time. It is plenty fast for my needs.

BUT if I were earning money with this I would say it was too slow. And especially if I were earning money with it and shooting RAW I would say it was too slow.

This iMac will be around for about two years and then become a hand-me-down, so I am not too worried about the limited RAM.