update for 9-19-13:
-Bubbles & Bath 230 gems (530 coins/2 hr, -190 goods)
-White Modern Luxury 220 gems (pop +150, 140 coins/4 hr)
-Serene Spa 11,300 coins (540 coins/4 hr, -190 goods) takes 8 energy to construct
-Yellow Modern Luxury 26,800 coins (pop +150, 160 coins/8 hr) takes 9 energy to construct
-Hall of Records 24,800 coins (cap +550, 200 coins/8 hr) buildable requires 4 security glass, 5 fancy pedestal, 5 municipal seal, 5 fixtures, 5 carpets; takes 15 energy to construct
-Orange Tree 3,300 coins