I had to make a similar decision a few months ago, except I was deciding what to replace a pressurized alcohol stove with. I decided on the Origo 6000 (with oven) and have been happy with the choice. The oven takes a little getting used to as you start from "high" and learn how far to turn down to get the whatever temp you need. The burners seem fast enough for me, and as someone else mentioned it's pretty much maintenance free.
I'm the only one I know among my friends who uses an alcohol stove, they all have propane, and for me it was simply a matter of personal choice as I didn't like the idea propane on my boat. I do use it for the bbq, but once it didn't light for a few seconds and, my mistake for having the lid down, made a mini explosion when it did light and I felt the force of it on my stomach. Didn't want to chance anything like that down below.