For a new Warhammer 40K player, what is the best army to start out with? I like Space Marines, Orks and Tau.?

I am new to Warhammer 40K and am looking for good advice in regards to creating a first army. I'm looking for something stable and forgiving, I really like the idea of Tau, but I also like Space Marines and Orks. I hear Dark Angels can field only terminators, which sounds neat too. Any help would be really appreciated.