Here's a link to my channel:
http://www.youtube.com//thomasalexandermusic
I've done all those videos with an Apogee Duet and a 100 dollar Kodak PlaySport Camera. I've used the Apogee One before and I highly recommend it. It just depends on how many channels you're looking to do.
Best of luck and let me know if you have any questions.
Thanks,
Thomas