Elegance

take the advice of getting the lonely planet book - i believe it covers singapore, malaysia and brunei.

Singapore is like a very large city, vibrant, noisy and expensive but you can have fun there.
likewise KL is also vibrant, it depends on what kind of fun you want to have , nightlife, drinking,clubs, sightseeing. yes there are plenty of beach resorts if you are into beaches..

But no way is KL boring ( just ignore blue panther ) I lived and worked there for several years and its a real eye opener.Like the singaporeans the malaysian love their food and you get three major cusines( malay, indian and Chinese ) plus many others.

You might want to try the smokehouse in KL for a fancy xmas dinner.

Regards