I will say that I will stay away from Servers Australia & Smarty Host.
Smarty Host, you just need to google to read the many many stories on them..
SA on the other hand, sold off their shared/reseller hosting clients a few years back. I was one of them at the time. Then just a few weeks ago I got an email saying:
'You were once our client, we're sorry you felt you had to leave us and we'd like to entice you back!'
Umm.. I didn't leave, they kicked me out the door along with all their other low level bread and butter clients. I guess it wasn't so green on the other side.
I actually feel sorry for the guys who bought us clients who are having to deal with SA poaching us back.
Unethical IMO.