Hi, I think you could go to these places listed on this page. Macau is small so that the shopping and tourist places are alway stay together. For branded clothes, yes, you could find some at very satisfying discount. However, for these European and American brands, it is a little higher than in its own country.

How long are you coming to Macau for? I think 4-5 days is enough in Macau for honeymooners, travelers I would say 3-4 days (only because they would travel at a fast pace and you wouldnt want that in a honeymoon). If you want a nice honeymoon..spend 4 nights at Venetian, located in Taipa Island.. as it has everything under one roof. The Canal Shops are great and has most branded stuff (at expensive prices, but there is a SALE right now and prices are reasonable), they have a food court with all different types of meals and they also have 5 star restaurants. Across from he Venetian the recently opened City of Dreams...and HARD ROCK HOTEL. nice for a night out - try HORIZONS great food. Then take a cab to SAN MA LOW..and check out the Portuguese and Chinese architecture. Also located there is ST PAULS ruins and Foretss of Mong Ha. San Ma low is Located in Macau. There is plenty of lunch options there. But if you want to head back to the city area.. try the GRAND LISBOA buffet or Star world Buffet .. real nice. Be sure to visit MGM as it has a really nice indoor/outdoor thing happening and its awesome. Another day you can catch a bus or cab to Cheoc Van beach and have lunch at LA GONDOLA...nice little Italian restaurant on the beach.
Now if you want cheap outlets there is really nothing like that in Macau .. but there is in Hong Kong ..so you might want to spend a few nights exploring there.
The only cheap stuff you get hereis FAKEs..and you can go get a VISA for ZHUHAI or SHENZEN ad go shopping there. Hope this helps