Noise issue with RAW conversions

Dear fellow Aperture users,
I have noticed on close inspection of my RAW images that that Apertures RAW conversion is less than poor. I shoot with a Nikon D70 and any dark areas on my images come out very dirty. I have tried correcting this using the new 1.1 controls but this doesnt help. However, when I open the same images on Lightroom, iPhoto or even Preview they come out fine, with a lot of detail!
I love using Aperture, even though it can be very slow on my 1.33 PB G4, but these conversions are not aceptable. I have recently started uploading my images to a stock library, but they have been returned due to noise!
If anyone has come across similar issues, or has any suggestions as to how I could rectify the situation, I would be more than happy to hear from you.
Thanks in advance,
Svendo

Let me prefix this by saying my views are wholly subjective. But...
High ISO ratings in Aperture seem to trade off between color saturation and noise vs. ACR. Aperture seems to go for saturation, which shows more noise chroma noise.
To get around this I created a couple of different profiles for different ISO and lighting/contrast situations. My high ISO800/shadowy profile has:
- Boost of 0.73
- Sharpening Intensity of 0.28
- Sharpening Edge of 0
- Chroma blur of 5.5
- Auto Noise Compensation On
Camera is EOS 20d, so I'm not sure how effective this will be with your Nikon RAW's. This gets me in the ball park for most, and then I tweak from there as needed. These results are similar to those I get with ACR (when viewed at 200%).

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Hello, rwboyer
Quote: "[sic with] pretty much all in camera settings
except white balance. In my previous tests with
everything set to pretty much "normal" in camera
Aperture's RAW conversion was close but not exact to
the camera produced JPG's of the same exact image
(camera set to RAW+JPG)."
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{Moderator note: Links to images were removed. Please only link to images that would be 'family-friendly'.}
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Noise issue with RAW conversions

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