I think you'll be happy with the XP. There's another cool feature it has (that other synths have as well), and that's the ability to assign full patterns to individual keys, and trigger them on the fly. It's a really cool feature for live performance and recording.

Squeak
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GEAR: Yamaha MOXF-6, Casio MZX-500, Roland Juno-Di, M-Audio Venom, Roland RS-70, Yamaha PSR S700, M-Audio Axiom Pro-61 (Midi Controller). SOFTWARE: Mixcraft-7, PowerTracks Pro Audio 2013, Beat Thang Virtual, Dimension Le.