hi Glen,
Well, I'm definately only voicing my opinion here. Firstly I certainly agree with both Scott and Andrea's coments. For me, I was at your decision cross-roads 18 months ago. My thoughts then were for a Roland A90x pluss piano card and various outboard modules. My concerns were that there was a lot of work required to produce basic songs and arrangements, too many external plugins (would they all work as they were supposed to, when they were supposed to)and how to transport all of the gear to gigs (the A90 is a mean machine to lug around) and the extended setup time once at a gig. So deciding against that combo I was courted by a Roland XP-80 (wow ! what a machine!)However although easier to transport than the A90, and it certainly had more tools for producing the goods than the A90, I decided against it because of the addtional bolt on modules I would need, and again the element of uncertainty - would it all work when it was supposed to (in the heat of battle on a gig) So, I settled on the arranger keyboard concept and have never looked back. If all my work revolved around a studio, then my choice would have been different - perhaps a more modular approach. Maybe a Roland A90 and an XP-80 plus.... I dream on.
Today, my Yamaha 9000PRO suits my needs without a complaint, or a sigh or a wish.
Hope this helps,
Jon.