Hi Weiser
One other keyboard that is in a similar price band is the Ketron SD 1 (Although the number of dealers is limited) which is also worth trying out.
Alternatively have a look at modern electronic pianos, as they have many of the same features as an arranger, but with keyboards similar to a real piano.
Most importantly, try them out and take your time when choosing, as they are an expensive investment if you get it wrong.
Hope this helps

Bill