Concur with all of the above. I have both the UO and the P300 with Multiwave, and the P300 is certainly the more dramatic improvement. The multiwave makes a big difference, too. Occasionally I have forgotten and left my P300 in normal 60 cycle mode, and after a short while listening, I can tell something's nit quite right.
You won't regret adding the P300 to your system - I wouldn't be without it!
You won't regret adding the P300 to your system - I wouldn't be without it!