I love the Avid Eleven Rack it works so good in Reason and it is a really great A/D-D/A audio device with a great Mic Pre. There is a stand alone software editor for Mac/Win, 64bit only for free which really makes using it and editing it a breeze in Reason.
Some more cool things to know are there are just 1000's of presets out there for this beast and you can find them by searching for Eleven Rack Presets on google. Another cool thing is you can download a .PDF file that shows you what each Amp, Cab, Effect was modeled after that has pictures and description here
I really love this bad boy and they have come way down in price and yet it still is a top notch amp sim and a dam good audio device, mic pre. Reason can Rock to 11!