I use a Volquartsen charging handle and like it but I'm using it with their bolt, too.
A friend of mine just took his factory handle and dipped it in that plasti-coat stuff one uses to create a rubber/plastic coated tool handle. He says it made a nice improvement but I haven't yet tried it in the field.
"Criminals thrive on the indulgence of society's understanding." - Ducard
I too did a volquartsen one and liked it at the time, but now I have gone and went for a new receiver with an AR style. it looks great and is smooth, but under my full size scope it can be a pain to operate as well. basically I think one has to get the handle to fit their particular setup.
I like the charging handle from the Ruger .22 magnum 10/22. I got the charging handle, complete with spring guide and spring from Brownell's. I cut off the crimped end of the guide rod, removed the spring and replaced it with a normal 10/22 spring. I ground the longer magnum guide rod to standard guide rod length and cut a little groove for a C clip. Inserted the C clip and replaced the assembly. It is a little bigger than the standard op rod handle, but not as huge as some of the other aftermarket handles.