New Line In's For Powerbooks And Usb Extsoundcards, Audio Options

[HowIMadeMyMillio...]

I need to know if the soundcard with the new Apple powerbooks (those with line ins.....15/17" models with backlit keys) are substantial for half decent music production.......IF THE ANSWER TO THIS IS "No"......

Is there a good external USB soundcard out there that that supports line in and/OR midi (doesn't have to have midid capabilities...Roland/tascam jobbies....) that ALSO have a keyboard attached as one unit. Sort of having a Oxygen -8 with a 1/4" line in for ext mics etc and ext midi capabilities (In case i want to use me minimoog wth midi as a controller)