I have multiple mowers. My very favorite is my Snapper Commercial with castering front wheels. It's heavy, expensive, but tough as nails. Nice cut too.
I have a Toro 60V self-propelled electric, 6AH battery, which is an absolutely awesome mower and is now the one I grab first. It is light, powerful and quiet. It has a real steel deck, Real Toro blade and cuts just like any Toro. I paid $399 at Homeless depot, but it looks to be $499 now. It will cut 1/3 of an acre. It also will blaze through ANY height grass, tons of power.
While mine does not have the personal pace feature, the grab-lever does modulate the speed just fine. The more you squeeze, the faster it goes.