i'm partial to the civilian cb450 myself. i have a 750 and i'd look silly as hell sitting on any of the smaller ones.
CB750 for me, mostly because I don't have one,..... Yet..
the 450 of course
bucky, Zaipai and tramp have gone the direction that I'd want to go.
Only problem is, they went for 2 different bikes!

Never had a regular 750 (got the 750A, even though I haven't gotten to trying to see if I can get it running yet!

AND, I've ALWAYS liked the 450!

Can't wait to see Hush, cause I figure he'll go for the Police model of the 450!

Of course, with me saying that, he'll probably go for another model.

Now, if I can just find one with the CB77 Super Hawk!
But then, that one'll probably have the CB92R (Race model of the 125 Benly Super Sports AND I've ALWAYS wanted one of those, even though I'd be a bit big for one now!