Hi Lee,
look I know what you're going thru. I knew I'd have an awful time trying to decide what to get, to the extent that I dropped out for nearly 6 months.
Didn't touch a keyboard in all that time. ( I take a break every few years to try & cure the addiction. Didn't work. haahaa).

If all I wanted to do was play, I probably would have gone for the T4.
The guy at the store gave me a brief demo, it sounded brilliant.
All set up, ready to play.

Then I read some of the Korg specs, the 2 main things on my wish list had been, XG Drumkits & 4 variations, almost like they'd been listening.

Eventually I'm hoping to incorporate my softsynths ie use my laptop as a soundmodule, so I really need the controller functions on the korg.
I'd bought a number of programs like Garriton, & some NI sounds etc, hoping to use them for more than just Band in a Box. Actually it was all going pretty well till I broke my laptop. I'm slowly getting stuff loaded back in.

You've really got to try & see both before you decide. The PA3X may not be different enough from the PA2X for you, if you weren't happy with the styles.
I use a lot of my own conversions, so editing is important for me, The xg drumkits have just cut out an awful lot of work in not having to remap drums manually, I don't use EMC for converting any of my PSR styles.