SiteGround is one of the best and most hightly recommended Joomla web hosting providers.
I recommend the "GrowBig" web hosting plan which includes dynamic cache. With dynamic cache enabled, a website hosted in Singapore will load just as fast in Australia as a website hosted in Australia. By locating your website in Singapore, load times are faster for website visitors in Asia, Europe and the USA compared to hosting the website in Australia.
You have a choice of data centres in Chigaco, London, Amsterdam or Singapore.
The service and support for Joomla websites in particular is second to none.
Tip: New clients often receive a discount on their first invoice so check for any current promotions before signing up.
Note: Since June 2018, SiteGround have massively increased their prices with no warning. I no longer trust or recommend SiteGround.