John & I have been corresponding privately on our experiences & opinions re: the P10K & P20K at Resolve. I haven't commented further in the forums here because we still have an issue on the P20K and I'm hoping to resolve it positively before writing up something describing the overall experience. I will say in brief that when they work (which for the P10K is now almost all the time), they are awesome, and certainly I feel the new inkset is a legitimate win as well. But they have been high maintenance so far with a number of unusual problems and, in our experience, all the usual clogging BS that we've come to expect.
Of course as we know with Epson & clogging, some people get it bad, some never really get it. So our data point is only that -- a single data point. We are heavy users, however, targeting the highest quality we can while increasing our print volume in recent years. So our clogging issues aren't down to sporadic use of the printers, or not knowing the tricks of the trade around dust, humidity and so on.
We don't necessarily regret getting these machines. But having said that, we do plan to seriously evaluate the big Canons this year, as well... just waiting for the 64" model to hit the market before we invest the time & man-power into the eval.