In your original post you did not mention that you already had a 60 and 150. Since I didn't know your photographic interests other than the mention of portraits I was presenting an example of what IMO would cover a large variety of shooting situations. There is not a huge difference in the coverage between the 60 and 80 (a little over 12 degrees). Extension tubes could give you both close-up and portrait capabilities with what you already have and a 2x would extend your range.
As Katie mentioned the 50 is a terrific lens and the more I used mine the more I liked it. IMO it is better to go with one system and have two bodies. That way each can use the same lenses and should one camera fail you have a back-up. I generally keep one length lens on one body and a different one on the other. I use the same film in both and that way don't have to change lenses. The lenses I have all take the same size filters except for the 350.
There probably are as many opinions as there are photographers and most of us say what works best in our hands. I have been using my current equipment for many years and I am familiar enough with it that I concentrate on the image and don't think too much about the camera.
http://www.jeffreyglasser.com/
As Katie mentioned the 50 is a terrific lens and the more I used mine the more I liked it. IMO it is better to go with one system and have two bodies. That way each can use the same lenses and should one camera fail you have a back-up. I generally keep one length lens on one body and a different one on the other. I use the same film in both and that way don't have to change lenses. The lenses I have all take the same size filters except for the 350.
There probably are as many opinions as there are photographers and most of us say what works best in our hands. I have been using my current equipment for many years and I am familiar enough with it that I concentrate on the image and don't think too much about the camera.
http://www.jeffreyglasser.com/