lol. If you are talking about the damn good ones, and also
extremely expensive, it would be Steinway & Sons and
Bosendorfer (There are some others too, but these 2 are more
prestigiously recognised). 
Haa,
just tell you for your knowledge. Ppl like us won't buy it. It's
too expensive.
There are second hand pianos, which are decent and at a cheaper
price. You might consider getting them. There is a second hand
piano dealer at IMM, cannot remember which floor. But I last went
there 5 years ago, so whether they are still there or not, I'm not
very sure. You can also try out Piano Man at Paya Lebar. Get a
honest dealer or you might be sold piano which are not up to
standard.
Some brands to consider: Kawai, Baldwin, Yamaha, Schiller,
Wilhelm, Schimmel, Steinberg, Young Chang.
For Schiller and Young Chang, I tried them in a piano shop in
S.Korea, Singapore dealers should have them, but for the brand
consistencies, im not too sure. There are a few piano dealers at
Peace centre that area, check them out.