Got the 03txh up and running and just listening to some CD's right now. Not fully calibrated yet as the kids are here and rowdy so I can't run the mcacc setup.
Rey like you said, not much difference from 1018>01txh>03txh. I originally was looking for a 1018, but they seem to have become slightly scarce but since I got an 03txh for $500 all inclusive, I was pretty happy.
So far, I am noticing some nice improvement over the onkyo in the low volume dept. Don't seem to lose dialog at lower volumes or lose instruments. Not that the onkyo was bad, but the pio is a noticeable, but not breathtaking, OMG, improvement.
Yeah, the gui sucks, but so did my onkyo's. Gui is not really all the intuitive at first.
Not real sure if I'll every really take full advantage of the THX stuff, it wasn't a selling point for me.
One thing I really like is the improved EQ settings and control, this will take some time to tweak fully even after mcacc is run. LFE and X-over settings are cleaner and now. Seems maybe the extra control in the EQ is allowing for better reproduction by my speakers. Again I really need more than a couple hours with it to really see where I want things set at.
We are watching Bolt BD again right now (just watched it last night with the onkyo). One thing I immediately noticed was the beginning of the movie sounded better on the pio, what struck me is how the fireworks over the disney castle sounded (the DTS-MA one, not the DD one). That was one that immediately caught my attention. Also the beginning after she picks out the puppy, the LFE and bass were handled much better IMO with the pio.
And last but not least, of course the wife likes the built in iPod USB port/control. Instead of buying a dedicated dock, it's a built in feature.