I'm very new at digital. I have been shooting RAW+JPEG. I really don't mind spending the time processing RAW images. It just is cool to me to have better control over how the JPEG turns out. To me, shooting in JPEG is like sending your 35mm roll of film to a lab - you hope they print it like you saw it. Many times, I have areas of the image that need burning. In my experience, with RAW, there is more data to work with to darken part of the image. I was frequently disappointed with film labs and their interpretation of how things looked. Now, I am in command.
you can change how your camera processes the raw to a jpeg its not like it does something different every time. it does what you tell it to do.
also i just printed a 20X30 from my 20d that looks perfect and it was shot as large normal jpeg not even the large fine. if you dont plan on changing the picture i dont think the quality argument can be used.
basically if you like pp shoot raw
if you like to do artsy things (pp wise) shoot raw
if there is tricky lighting shoot raw
if you have taken 5k pics on your camera in 2 months and havnt been off more then 1/3 a stop and dont like the artsy pics of my kids then shoot jpeg
basically if your me shoot jpeg