I don't think Apple carries V-MODA products anymore. You should call before you waste an hour's worth of driving. I think the XS will provide you with more than enough bass and there's always EQ. For some reason, the bass output of the M-100 gets super exaggerated on Head-Fi.
Oh, and if you order from V-MODA directly, you'll get free custom engraved shields and an audio-only cable. It's worth the extra $12 over Amazon.