Some of the local Family History Societies have projects to transcribe parish registers and they make photocopies of the original registers. Once the records are entered onto a computer, the photocopes are returned to the County Records Office for use by researchers. This seems to strike a good balance between preserving the fragile registers for posterity and supporting research. If you find your have a host of ancestors from one parish, it is often possible to get a complete set of that parish's records but coverage is very sporadic. I should imagine accuracy is better than with LDS as each entry is checked repeatedly. It's probably worth checking the web site of the FHS for the area of interest to see what they have. I am a member of one society and for a nominal fee, I can get somebody to check a register entry for me, which is very helpful if you live 200 miles away like I do.