Apparently Antler also make this one that weighs only 1.7 kg (called revelation weightless) and it wasn't badly priced either IMO (apparently, at £55).
I have been using a Cosmolite from Samsonite (which weighs in at 2.22kg, apparently), but I find the single telescopic handle (as opposed to the double telescopic handle, forgive my lack of technical terminology) is irritating for when you want to put a bag over the handle, as the bag you put on it invariably falls off!