the 2X will have a motorized screen to angle anywhere you wish. It will have 120note polyphony vs 60 on the 1X. It will have 128 MB of sampling memory expandable to 256MB. The 1X has 16MB of memory expandable to 32MB.
There will be a lot more super articulation type voices on the 2X. There will be 2 USB to device ports. The PA1X has none.
The difference in price will be $100.00. Yes, it is worth upgrading to the 2X



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George Kaye
Kaye's Music Scene
Reseda, California
818-881-5566
www.kayesmusicscene.com