[CJ (Chris)]

Originally Posted by OzStarGazer

I wish I knew from experience...
But all I have for "comparisons" is this website I once bookmarked:
http://telescope-simulator.com/telescope-calculator/
http://telescope-simulator.com/home/...pe-comparison/
It doesn't show DSOs for comparison though (apart from the Pleiades), which is what you are probably after.

Stellarium can also show the size of objects via the Viewing config, Plugins, Oculars menu. Takes a bit of setting up but once done it's quite interesting. And it can do any part of the sky.
Cheers