Very quick question - should I get Backyard EOS or Astro Photography Tool to manage my 50D?

Slightly longer version of the same question - I have a 50D, thinking about getting a 60Da. I also have ED80/EQ6 Pro/ST80/Orion Starshoot AutoGuider/PHD/Asus EEPC. Which DSLR camera control software should I get and why?
Colin