Mel,
I am by no means an expert... Merely a rifle looney and Leupold slut. To me, the asthetics is the determining factor in choosing a scope for any given rifle. I own an obscene number of Leupold scopes and amoung them are 4; Leupold 6x compacts. 3 of them with AO. These latter I consider about perfect for a .22 Hornet or .218 Bee.
THe one remaining compact is on a Rem M-Seven MS. I also own about 10-12 M8, 6x36's. These scopes get mounted on usually a long action where they fit asthetically. My 6x42's are usually mounted on full-size rifles of appropriate hunting chamberings.
I was a fan of 6x scopes long before I became a member here. Every one of the Michigan whitetails I have taken with a scope have been taken at 6x with one exception. I think either 3 or 4 were taken with 2.5x8's or one with a 4.5x14x (All Vari-XIII's) Ironically all set at 6x.
I particularlly like the 6x Cpt on lwt rifles. Eyebox and brightness is of no concern to me. As long as the rifle mounts up reasonable and I can see thru the scope. (I don't like hunting for a sight picture...)
Here in MI, shooting hours are defined as one-half hour before official Sunrise, and one-half hour after official sunset... Thus; having that last 15 min of shooting light is a moot point. In that window, I can see just fine with a 6x cpt.
I think the biggest drawback to the 6x Cpt is that due to it's short length, it loses lattitude in mounting. But, if fits, and I can see thru it, I like it just fine...
Hopefully the above is of some use to you... altho' YMMV...
GH