The guys at Floodslicer were just featured in a CGSociety article showing off their mighty Melbourne-based architectural visualisation work. The article looks at the approach they take on projects and some of the tech they bring to bear on things for clients. The article and their homepage both feature their showreel as well.
The Floodslicer page itself is very engaging, a cool gallery mechanic bringing their graphical product front and centre.

So here are a few images to show a snippet of what they can do, specifically a few renderigns for the AT38 Tower in Melbourne:

[Floodslicer visualisation images via the AT38 site]