calculating NMR spectra for crystal structures



Dear all,
 I would like to calculate NMR chemical shifts for a number of crystal
 structures containing H, C, N, O and P atoms.  I know that this is possible
 using e.g. plane wave codes like CPMD but I would like to hear the opinion
 of you who have a lot of experience with this type of computations.  Can
 anybody tell me what type of codes are most suitable for my purpose and give
 me an idea about typical CPU timings for these type of calculations?
 Thanks a lot!
 Betty
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