Thanks for the responses! This definitely gives me more to consider...
I keep hearing that Korg is the easiest to use (sequencing), but then lower models leave out feautures I want. I do like the Yamaha Mo6/8 & Motif sounds, but the complexity of using it and the sequencer is a dealbreaker. The Juno-G has many features and then some (the 4 tracks of audio recording), but it doesn't sound much better than my SC88Pro (listening to Roland's demos) and having to buy additional expansion boards to get the sounds I want (like the drum exp board) is a bummer.
I'm tempted to go back to a PC and use my old 61-key controller with my Roland module and also pick up Korg and Yamaha rack modules. I just found out that the 8-track digital recorder in my GNX does not send/receive MTC/MMC. This is a problem as I would want to sync it with the sequencer of whichever keyboard I get. The other option there would be to send all mixed synth audio to one stereo out and the use tracks 3-8 for guitars. This would suck as I wouldn't be able to adjust drums, piano, etc., individually in the final mix.
Since the MM6 is better for "ready to play" instantly than the MO6/8 or Motif, maybe I should get that for sounds and to use as a controller for my Roland, and pick up a Korg rackmount to control with it as well. Like I said before, if I went back to PC-based sequencing/recording it would eliminate the need for so many features all-in-one keyboard!