As HSV have advertised "i just want one"!
I'm a tradie, although as i'm largely off the tools now I can justify it to myself (and more importantly, the missus) as a family/work car.
Only reason i'm swapping from the king cab is that i need to fit a baby seat in it, i thoroughly intend on keeping this one for a long time, hence wanted the best i could get.
If i was lugging tools around from site to site i wouldn't get the 550.
I totally agree about the trim options, for the price they need leather sat nav etc etc, but when you look at the regular STX they aren't that badly priced considering the extras you get on top of the motor, if those extras happen to interest you that is.
I drive a lot, and i take grest pleasure in droving and my car & making changes to it that suit me, i just wanted one at the end of the day!