Apologies for the massive bump but I guess this shall be my first post here.
I personally use ACID Pro 6, and yeah it's a very easy to use music program. It doesn't have to be used solely as a song creator based on loops. It's useful in MIDI, chopping/slicing, and multitrack recording. From what I've demoed in terms of audio software (SONAR, FL, Cubase SL at school), ACID's workflow is quite intuitive and easy to grasp for the complete beginner, and is nice to work with.
After someone (indirectly) introduced me to Frost*, it's a great honor to join this community.