What kind of camera dslr camera to get?

Hi! I have had a nikon d5000 for almost a year and a half, but I really want to upgrade my cameras to something in the $1500-$2500 range. I can't seem to decide between the nikon and canon cameras and all are so good!

For Canons: EOS 5D MARK II, EOS 7D, and EOS 60D

For Nikons: D7000, D300S. I can't figure out why the d300s is more expensive than the d7000?

I'm looking for an all around camera and something good with low light. I do enjoy taking portraits of people and like soft tones.

The Canon EOS is great for low light and I use it mainly for portraits of people. But the Nikon D700 is personally my favourite camera to use because the sensor is better. However, if you are after low light, then the EOS is the go.

The difference between the D300s and the D700 is the sensor size, which basically makes up for the price difference. Also the D700 has a better sensitivity and autofocus than the D300s. But I have looked online and found that the D300s is a bit cheaper than the D700 anyway.

If you have lenses for your Nikon then stick with Nikon. Otherwise check both models you like and decide which feels the best in terms of operating and holding and sighting through.