Hi Tim,
If you have this "expensive Hobby", like me, and you can afford having those two TOTL amazing arrangers just buy the Korg Pa800/Pa2x!!. The Korg sound will add a different touch to your music. I have a Pa500 and I am still amazed by its sounds and styles at least for the "home" use I give it. Or you could also buy a Pa500/588 and a good computer for playing Vsti (something I've been doing with the Mediastation) and I can assure you'll never get bored of the sounds you hear. In this way you would get the Korg styles + an unlimited instrumental soundsource for the melody part(imagine adding Garritan Orchestra sounds for example). If you don't make complex arrangements using the computer and you play at home you can use it live mostly without problems.
Just a different idea. Good luck.

Victor