I have a Marlin 1894C in .357, and absolutely love it. As mentioned elsewhere, the trigger is a lottle sloppy, but soon here I'm going to get one of the Wild West Guns improved triggers. I believe Brownells also carries them.
On this carbine, I have installed a cheap Truglo 30mm red dot sight (I know putting dot oprics on a lever gun is a heresy), as well as Williams Firesight fibre optic front & rear sights. The Williams sights look to be the same setup as is offered on the 10/22. My only complaint with them is that the rear sight is held in place with only a set screw, ad the Williams sight is a little small for the factory Dovetail. Thinking about installing a windage & elevation adjustable folding rear sight as made by a few companies, also available from Brownells.
Overall it makes a good all-purpose carbine. Can be used for home defense, small game gunting with .38spl loads, a more than suitable short-range deer rifle with 180gr .357 loads, a plinker with fmj stuff...
Next to mr AR it's my favorite long gun.