I don't like an arranger if it does not have the following:

-a good price, sweet price range for me is $500-$1000. I understand anything below $500 might jeopardize quality. Roland GW8 is a good example that falls in the range but the 61 keys are limited.
-does not have 4 variations/fill-ins
-does not have at least semi-weighted keys or just bad feeling keybed. Hard to play piano with nice feelings without good keybed
-nice frequently used sounds such as piano,fat basses, strings, elec piano, brass, sax, flutes, guitars and drums.
-difficult to navigate like the Korgs, yuck

I use arranger for pleasure at home and maybe once or twice a week for gigs at churches playing contemporary songs with many styles (rock, ballad, 8 beat, etc).