Sounds like the F-ration is twice that of the Dob, (F-11) to (F-5) therefore making it hard to compare as the not only does the 80mm have no where the app...but it's F-ration is designed more for Planetry rather than DSO. Does that make sense? I am probably telling you, what you already know, however it does not hurt to talk about these things as I need to learn.
Anyways, the next star must be pretty decent for what it does as I do beleive they are extremely popular....I've also heard the st80 talked about a lot...I do beleive its all been pretty good.
Orion sounds like a treat...I too, enjoyed veiwing that through my new Dob!!! The moon was up and pretty bright during my session at that time...I wonder if thats why I could not quite make out the colours you described...well that is what I am telling myself! (LOL)...anyways, The nebulosity was awesome to say the lease...I can't wait till I hit a dark site with my 12" scope.
Take it easy man, I'll check back to see if you record any more veiwing sessions!
Later Dave
