Are there any keyboards that have next to their arrangers also a good working appegiator?

I saw some awesome demos of the Arpeggiator in the new Motif range from yamaha... they have over 4000 different arpegios preprogrammed and more then half of them follow chord changes..
This way they could easilly be added to your autoaccompaniment as extra riffs following your chords(which can bring some nice changes when improvising jazz )...or just as arpegio's for a more Deejay like modern playstyle..

I almost forgot how much fun it can be to play arround with a good arpeggiator.


So are there any top arranger keyboards with build in arpegiators ?

Are there any software arpeggiators that can do things like the Motif arpeggiator ? (preferably vst's as i might wanna run them on my PC in accompany to my keyboard)