What kind of sound are you after?
I have only heard the P03/D03 with the clock and it is a very nice player. Quite warm or rich and sounds as solid as its construction. It is lust worthy to look at and use.
I have not heard the Metronome in a system I know, so I would not comment on the differences other than it was a nice player.
The Kalista as a transport is a work of art. Personally I am not a fan of top loading transports. I never got used to the fiddling with the puck and the disk and then the removable teapot lid. I always felt I needed another hand. I also mistrust disks being read in the open light. I had an Oracle some years ago and it drove me mad. Although it was a good sounding machine at the time, it sounded quite different with the lid off.