Guys I'm down with couple of options here,

My sis has a 40D and she's not into photography.

First option:

Buy a D3000 and swap with her 40D, buy a sigma 18-70mm 2.8-4. = RM~3k

Second option:

Wait for a560, get the body end of this year, and buy sigma 18-70mm 2.8-4 = RM4k++

Or

Get a550 body and siggy. RM3.5k~~

My concern is, can the 40D still perform? As I hope not to spend so much because I still wanna buy 50mm, grip etc.

Please give me some suggestion guys! I thank you in advance.

Try Canon 500D..