GR Digital IV: perfect street camera?

I pop my head in here from time to time, because I just love Ricoh's ethos of unashamedly making cameras for photographers. It's flattering to imagine oneself walking down the street with a GR Digital in hand, firing off cleverly observed snapshots with the greatest of ease.

Such dreaming led me to buy a GR Digital II. But this camera was too noisy and slow for my taste, and I got rid of it within a couple of months ( http://forums.dpreview.com/forums/readflat.asp?forum=1013&message=40692967 ). I liked almost everything else about the camera. The lens was a real beaut.

The GR Digital III seemed ideal on paper – new sensor, better shot-to-shot times, faster lens – but reports of high-ISO banding noise gave me pause.

The GR Digital IV was shockingly expensive when it came out, and it's still very pricey. But my compact camera is my most-used camera, so maybe it's worth spending serious money on it.

Question: is the GR Digital IV as good as it seems? No hidden gotchas to worry about? Does the stabilisation work? Has anyone regretted buying one? Why didn't Ricoh put a GPS receiver in it?

I know the Sony RX100 is the darling of the moment, but I've rejected it for my own use on several grounds, while acknowledging its innovation and broad appeal.