The drawbar organs in the Yamaha S-series have the proper perc triggering (and selection), as do the Tyros series...all are sampled without Leslie or effects, so would work well with an external rotary sim or cabinet. I've used the S910 and Tyros4 drawbar organ sections on a buddy's Leslie 147, and have tried a Neo Vent in store using the T4 and it sounded pretty authentic to my ears, and I was a Hammond B-3 player for many years.

Reverb (and distortion) send can be pre or post rotary effect, which also has variable ramp speeds and several tone cabinet models to choose from, even those using guitar amps (allegedly Marshall and HiWatt).

The Preset Organs are deliberately set up differently, with sampled chorus vibrato and/or rotary (no reverb), providing more variety and complimenting the organ flute (drawbar) section very well, indeed.

The preset SA organs in Tyros4 (especially Whiter Bars and Prog Rock), many of which are in S-series, are some of my favorite and most used organ sounds, with fast rotary on the mod wheel. A Whiter Shade of Pale sounds as close as I'd ever wish it to be, and the T4's added SA combo organs are perfect for the Door's, Light My Fire.

For the songs I use organ for, I'm totally content with using what's on my arranger (the T4), and I have no need of adding anything extra like a module or external Leslie or sim. It's nice to be able to keep things simple. I have even figured out how to get realistic Leslie speed changes in a style, and it sounds so cool.

I'm sure Korg's PA3X (and 600/500) would also be just as flexible and equally as useful...I suspect only the real die-hard purists would need (or want) to invest in additional gear.

Ian