I'm sure that there is much info comparing a battery vs fuel powered mower out there. Battery mowers typically start and run and need less maintenance. There still seem to be trade offs such as less power for bagging or heavy grass. When batteries or circuit boards fail, expect the cost to be higher, but hopefully that's 5 years plus down the road. For gas engine mowers, I tell people to buy one with either a Honda or better Briggs engine. If one keeps fuel treated and can do basic maintenance - you will be able to keep the repairman away for a while.
So were you thinking of a mower that bags, mulches or simply discharges the clippings out the side? Self propel?

tomplum:

Thanks for the reply.

The cordless electric is appealing because of the always "starting", but I'm not too keen on the idea of circuit boards (most often a point of failure where used) or proprietary batteries that may or may not be available down the road when they need to be replaced.

What is considered a "better" Briggs engine? I know very little about internal combustion engines and as such is the major reason I'm considering a new mower versus fixing my Lawn-Boy. I'd like a bagging mower, but would consider one that does mulching (my Lawn-Boy can do either) but don't really like or want a self-propelled feature.