They only alt coin I'm interested in is Litecoin at the moment. It's established enough that it can live on it's own. I don't see a need for many of the coins out there. There are some that are pretty interesting such as Namecoin but many just don't need to be there.
Is mining litecoin with my rig which has a speed oh 400kh/s be profitable???
I would say no. Maybe if you had free power but even then you aren't going to get much to make it worth it. You need a better GPU to really make it work.