G'Day Peter,
My usual routine is:
1. Capture ~600 frames (DMK gain about 380 is best, but I push it higher if I need a shorter exposure to beat the seeing - the trade off is noise

)
2. Make a reference frame from the best 10 and sharpen it with wavelets.
3 Optimise.
4. Before Stacking, on the stackgraph, I trim the frames to the point of inflection on the quality graph or 150 frames which ever is least, then adjust the difference slider till the stack size is about 100 frames.
5. Stack.
6. Sharpen with wavelets and save.
7. Open in PS and adjust levels, curves and colourise.
What's a typical frame?

I get everything from mush to reasonable detail... the only tricks to it I think is knowing when your focus is as good as it'll get (i.e. occassional sharp frames are visible and focusser about 1/2 way between full fuzzy in and full fuzzy out

) and working out your processing to sort the good ones out of the mush...
Unfortunately, all my videos are archived onto DVD already, but I really don't think one frame will tell you much. If you are really interested PM me your email address and I'll send you a full video -about 750M - via YouSendIt (probably on Saturday morning when I'm on off peak bandwidth

).
I've attached a stacked image and a stacked and sharpened image from the full disc shot. That should be more informative than a single video frame

.
Al.
PS Exposure in these two shots is as captured. I play with levels (not often on full disc shots) and curves in PS.