Hello Force,
It's a matter of what's most important, the sound you get from the Ketron or the easier operating system of the PSR3000. Both are great keyboards.
I recently switched to Ketron SD1 after using Tyros, PSR 2100, etc for several years. Others have gone the other way, from Ketron to Yamaha.
Personally I feel the live sound of the Ketron, particularly the drums and bass are worth the steeper learning curve.
There is more aftermarket support with Yamaha, with thousands of free styles available. However, styles are available also for Ketron, and my experience has been that I don't need as many extra styles for it as I found myself using with Yamaha.
The PSR3000 has the vocal harmonizer built in and also has the capacity for smart media storage, which is inexpensive. With the XD9, the hard drive and vocal harmony are optional extras. Same with the video output. If these features are important to you, the Ketron will end up costing more than the 3000.
Really, you can't go wrong with either choice.
DonM
www.donmasonmusic.com