Which camera is best?

For my birthday i'm going to get a camera and i have four options:
Canon EOS Rebel XS SLR Digital Camera (Black) with 18-55mm IS Lens Kit- $479
Nikon D3000 SLR Digital Camera with 18-55mm VR Lens- $449
Sony Alpha A390 Digital SLR with 18-55mm Lens- $499
Nikon D5000 Digital SLR Camera Kit with 18-55mm VR Lens - $499

now the one i really have my heart set on it the nikon d5000, but at b&h photo is says that its discontinued, and i would have to buy it used. I'm totally fine with that, because its a cheaper price. But i just don't know if they'll have it at b&h in new york city (thats where ill be buying it) or if i have to order it online.

if i decide not to get the nikon d5000, does anyone know which camera is best quality?

Nikon D5000 super great qualityy.otherwise the Canon onee!

Go with the Canon Rebel! I love the camera. It has many nice features to offer.

I just got a canon camera for my borthday and I LOVE it, I would recommend the Canon EOS Rebel.

The Nikon D5000 is the best quality of all these cameras. It has all features and performance needed to take professional quality pictures. After that, I would probably recommend the Canon XS or the Pentax KX. Both are very good as well.

Canon EOS Rebel T3 is better; it has an HD movie mode and the video quality is excellent.

I found it here at a good price:

http://www.amazon.com/...004J3Y9U6/

Read also this review to help you decide what suits more your needs:

http://www.amazon.com/...EC1Q1BV3T/

Otherwise here is the link for other ones:

http://www.amazon.com/...003TQN2VG/

http://www.amazon.com/...00267S7TQ/