It all depends on from where exactly you are buying in Singapore. While high end audio maynot prove too economical with the difference in pricing being minimal the normal consumer goods might prove to be much cheaper if bought at the right source. The items like iPads / iPhones, SONY LCD/LED and some of the camera's and lenses might be cheaper at NARANJAN Electronics ( popularly known as Sardar's shop....race course road off little india). The high end camera's might be better with ensured quality at John 3:16 shop at Funan Digital Mall or Sim Lim.
For high end audio gear Adelphi is ofcourse the ultimate source. Try at Alpha at Adelphi Level 1 for the all medium to high end audio gear including the Maratze, Denon, Yamaha, MS, Mission, Wharf's and others.
Cheers, Kishor