emorej691977,
offset is the measurement of the imaginary center line of the rim to the mounting pad.
Yung PCD naman is the diameter of the bolts.
Pls refer to the site below for more details: http://www.bigcustomwheels.com/rt_specs.jsp
As to which mags bagay. Mags is a matter of acquired taste. Ikanga "beauty is in the eye of the beholder".