Ah yes, diffusers are starting to become a home decorating and refreshing trend. Those aroma reeds do work, and not every diffuser is created equal. Where do you go to buy your diffuser for the home? If you don't use a diffuser in the home, then who do you know who does? Where do they go to buy theirs?
For this type of item Peters of Kensington has always got a great range, and Ecoya is available, plus they deliver when you buy online. Myer and David Jones are always a good safe bet, but other stores including Tree of Life, Freedom Furniture and Papaya (also online) also have great choice. Whether you want instore or online, there's somewhere close you can get one of these! One word of advice, be careful with the Peters of Kensington option, you're going to want to buy more than just your diffuser, the range and quality is second to none!
Bed, Bath and Table has some good ones, including an Ecoya range. The employees there are really helpful and give you plenty of advice about the products and how long they last. Also, Dusk is great if you want a big range.