This time last year, I was imaging with my trusty Canon 6D on my Esprit 100. Nice flat field/round stats right across. The 80 doesn't claim to accomodate a full frame though.
It all depends on what FOV you want. There's always more than one way to skin a cat. Don't be afraid to experiment, after all, it's only money
I've recently been experimenting with chasing galaxies and small objects with tiny pixels on my 550mm F/L scope, heresy to the traditionalists. The detail possible on a good night has astounded me.