Very nice review. My biggest complaint is that it's Win only. This would be totally sweet on the Mac, especially with DevonThink Pro Office integration. Unlikely, I know, but I can dream.
I've had my 3600 for quite a few months and do like it. One reason I have a Mac Mini on order is that I got tired of hauling out my old Dell laptop just to use this scanner. I tend not to use the OCR (I use Acrobat's instead), but agree with Liviu_5 on using .tif (not .jpg so much for text).
The only thing I've found annoying is that I sometimes get the page rotation thing going wrong. Operator error, I'm sure, but sometimes it works just like I think it's supposed to and other times the opposite. Occasionally, I'll fiddle with it until it's right, but most times I just quickly fix it in Acrobat.