I love KL so much. I'm going in a month and staying at One World. Check out one utama, you can take the aeroline to Singapore. Also check out genting Highlands, take a 1 hr flight to penang for the food.
There are some good shopping areas near ikano and the curve, good food there too.
Enjoy yourself. I absolutely adore the city, even with its shitty traffic.
Get some teh tarik and roti cannai for breakfast!