Havian is the only real stagepiano/arranger hybrid... Maybe a Havian 400, a havian with the pa4x inside... Now that would be tempting for me..
The arranger part of the havian 30 is equall to the pa300, which is still kind of the low end of the spectrum..
When looking at Yamaha's DGX 650, I considered the Havian 30, more keyboard than the Yamaha...but also twice the price.
The arranger part of the DGX 650 is very elementary compared to other arrangers..maybe on the level of a PSR E4xx.
Thing is, I want to have a weighted keyboard for trying to learn piano...and the DGX650 seems to hold up well for the price.
Since the DGX 650 won't be used for gigging, arranger capabilities were not a high priority for me. Besides, a person can midi from the DGX to another arranger, should that be desirable. That's what a piano playing friend does.