Avent,
I am a big fan of Avent. If you want to get Avent sterilizer, taka baby fair has got good offer, like those describe by Feimei, around $130-150, got free bottles, pacifier, boltser, etc..
So far, I am okay with Avent bottles. You need to make sure that the teats are well assembled to avoid leakage. You need to hear the "tick" sound when you assemble the teats, if not it will leaked. The one experience which I encounter bottle leak is that the teats have problem. No matter which bottle the teat goes to, the bottle will leak. So I went to the Phillip service centre(in Toa Payoh) to complain. They exchange one to one.
There's also another good time to buy Avent products is during Phillips carnival Sale. They have it every year. last year, they have it in March and End of year. If you have frens working in Phillips, they can help to buy at staff prices. usually 40% off during christmas time.