I recently went with an electric after my 20 year old honda died. The electric is unbelievable. Removable battery, very light compared to gas, low maintenance, very quiet. I cut about 1/4 of an acre of grass at a time w/out the battery wearing down in any noticeable way as far as function of the mower is concerned. I went with the self propelled, but my friend bought the same one with out the self propelled and loves it. His yard is 1/3 acre grass and flatter than mine. Battery lasts 4-5 years and is about $100 to replace. Costs pennies to charge the battery. 5 years ago I would have stayed away from them, not anymore. So now I mow with the electric, a 1949 farm tractor, and goats. Needles to say the electric requires the least maintenance.
Amazon.com: Black & Decker SPCM1936 19-Inch 36-Volt Cordless Electric Self-Propelled Lawn Mower With Removable Battery: Home & Garden