I am actually looking at all of these at the moment, only 2wd as do round town driving. I found found price wise "brand new" you can get top of the line 2wd Colorado etc for the same price as a pov spec ranger/hilux. Also see the new Colorado isn't a 3.0L they have changed to a 2.8 "apparently better according to the salesman".
They also basically all seem to only come in diesel now if your looking 2wd other than the Hilux sr5 version, which then bumps the price up huge anyway. So from what ive seen the Colorado seems best bang for buck if you like all the extras with reversing cameras, sports bar on the back etc.
Haven't checked out the D-Max yet as haven't seen one on a yard i have driven passed, but seems like i might have to go have a look.
Theres probably a whole lot of pointless information that you all already knew
p.s if i decide to get a new Ute, i will have an 06 2wd Hilux done 165 if anyone's keen