Geographically speaking, the money in OC is South OC: Airport area, Costa Mesa, Newport, Irvine, then everything southeast down to coto & san clemente but it gets to be too suburban & spread out.
Old location was right off the 405, super convenient for a large area.
Brea is way up the ass 57 freeway & everything around there sucks. Its far from LA proper & inconvenient to drive to from south OC.