Crosman 160 - particularly the Ted Williams model is streets ahead of the Sheridan Mod F in my opinion.
It had a peep rear sight as standard and was machine grooved for a scope. It had a sliding hatch in the rear of the stock to carry spare CO2 bulbs. Easier to maintain, think Crosman 150 pistol and those features put it ahead of the Mod F.
[IMG]
TW 160 by
Mark Davis, on Flickr[/IMG]
TW Breach by
Mark Davis, on Flickr
Ted Williams 160 by
Mark Davis, on Flickr