One thing I really like about recording the 900 into a daw...is the ability to record all 4 outputs
at the same time. ie...main stereo outs could play all regular keyboard tracks. The 2nd set of stereo outs could record your drums and percussion. This requires a 4 input audio interface, but Dave turned me on to the Behringer UMC404HD ($136.00) at Sweetwater. Depending on your computer and how many effects you use in the daw...latency is not a problem.
Good luck,
Mitch