What is the best internet provider for the top of Buderim near Wirreanda Park?

Definitely BigPond, I have been with them now for several years, many friends and family have tried Optus, iinet etc, Optus works in certain areas really well, but for consistent coverage across Buderim especially wireless BigPond wins by far, you can google the Telstra site now to see if your street has ADSL2 and when the upgrades are scheduled, this is helpful in identifying which provider is more efficient.

BigPond for the last few years.
Go with the strength

Bigpond- although there is some lag time with the connection during peak hours

For INTERNET, I use Telstra for my NBN and my download speed on Dixon Road where I live is over 50Mbps most times and therefore briliant. I'm in an old house so would never consider tryng to use the ADSL2 wiring for a home line or the Internet.
For MOBILE SERVICE I use Aldi which uses theTelstra towers. Half of Buderim is very patchy with all providers and drops to 1 bar on 4G or just 3G around my area especially. Inside my house I use WIFI calling. There are more MOBILE service upgrades coming at some point...

Ours is with Sunshine Coast Internet.
They are a local company that use the Telstra network. there was a problem with the cable in the house and they worked it out and put us in touch with someone that fixed it for us.

Stay away from IINET that is all I can say. I cannot recommend Telstra, but IInet support and service will leaving you wondering if you live in the third world.....12 months and counting still no stability.

Telstra/Bigpond without doubt. I have been using Virgin on the Optus network and it is very patchy.

iiNet all the way, been with them since 1999 and couldn't recommend another.