Good idea: The Aztek is better than any Harbor Freight knockoff any day.
The C-H compressor at Wal-Mart will be just fine, if a little loud, but all compressors of that type and size are. Just fill the tank before you work and spray directly from the tank and it will be much more pleasant to use.
BTW- Take that Michael's coupon and go to AC Moore and get an Iwata: SO much better than either Paasche or Badger.