Who buys a DSLR and shoots in jpeg?
If you are spending that much on a camera, you should be shooting in raw, or you are significantly reducing your overall quality.
In camera noise reduction is meaningless because you should be shooting in raw only, or at most, raw + jpeg if you need somethign to throw up on facebook or something quickly, but there should never be a time whenyou are not shooting in raw. storage is cheap (I recently purchased a 64GB PNY SD card (90MB/s read, 60MB/s write for $30)
storage is cheap, shoot raw.