Alright,
seems like more information is needed. I want to measure or calculate all kinds of power: active, reactive, complex and have a special interest in deformed power. Would be great if I could derive the current waveform for further analysis. I don't care about the voltages waveform as I expect them to be pretty stable. I know this ain't always true but I'll leave that for a possible later iteration. I don't mind sending data off to a PC or log on a sd card, this will most probably happen anyway. If doing so I might as well simply take the waveforms and do anything later.
I already searched the usual suspects before posting here. Power metering IC and energy metering IC being my search terms. I was overwhelmed by the sheer number of hits and thought I might have been wrong because it seemed I only found those devices catering to simple power meters, returning pulses or maybe analog readings.
This all may seem a bit confused. Don't worry - I have not yet settled on the way I want to tackle this.
Thank you all, for your quick replies. Further comments are of course welcome.