That's precisely how I started out Oleg, when the AJ2006 arranger was in it's formative stages. Even today I often still use the PA80 for styles with lead voices from the laptop. Exceeding the quality of any of the current arrangers for lead voice sounds is quite doable using software.

I found for me it's just easier to use One man band though then trying to combine the output of the PA80 with software sounds. It's a breeze to play in real time with the Motif ES as my controller, because there are enough adjustable and assignable controllers on it. Many of the generic controllers in the $200-400 USd price range would likely even work better. I can already match the quality of the style voices using freeware soundfonts and a couple of well placed effects.

I can also exceed it with better modules, but the problem is that many of the better sounding modules and samplesets do not recognize bank and patch changes, sometimes even simple GM commands. Even the one that do or ar supposed to don't seem to get it right 100% of the time. Hence the reason I stated on another thread that I am in the beginning stages of building a GM supersoundfont.

If I had better programming skills, I might be able to make an entire module just the way I want it. I have even considered giving it a shot using Synth edit as a wrapper. In this way, with the right midi controller and set of commands, I could control just about anything I needed to on the laptop or in OMB by going through the module.

The advantage of using GM only is that I won't have to do much if any adjusting or tweaking from one manufacturers set of styles to the next.

AJ