The Roland Fantom-G, when released within the next 3 or 4 months (hopefully) will be the workstation with the most advanced features. The other consideration is sound, but it sounds like you are more concerned with features and recording capability. If so, check the specs on the Fantom-G versus the Motif XS and Korg M-3. I think you'll be impressed with the Fantom-G.
Here's a link to the main Fantom discussion forum
www.fantomized.info