Well, that just about covers all the price ranges, there...

For your kind of act, the GW-8 might do it pretty well, using SMF's and MP3's and the like. The arranger section is not bad, but the lack of 'tweakability' might be a problem as I know you like to customize quite a bit.
On the whole though, I don't see it as a viable alternative to the E60 - 61 notes, no Makeup Tools, much simpler navigation and control...

Why don't you just settle down for a while?