Apple Logic Pro /LogicExpress Discussion

Hello group!

Just joined and have a question about sample rates.  I've been salvaging 
some old vinyl-bakelite record cuts from my old band -- firstly I've transferred 
to HQ analog audio tape, and now play the tape back into my Mac G4 running 
Logic Express 7, with a MobilePre USB interface.  Using the USB, that gives 
either 44100 khz or 48000 khz sampling frequency.  But the software says 
also, it is possible to sample at 88200 or 96000.  Two questions:

1.  Is there an economic interface available that will allow those higher 
sampling rates -- my search turned up nothing specific.

2.  The ultimate goal is to burn the song cuts to a CD.  I haven't got to that 
stage as yet, and so wonder if it is over-kill to pursue such higher sampling 
rates, if this higher-quality would be lost when burning to the CD?  What's the 
max high quality sample rate for a CD?  

Thanks in advance.

James