first, although i would have liked to have the slightly more powerful engine offered with the 46, i didn't want the electric start option. i think that if they offered the 46 with the engine upgrade only w/o the electric start i would've purchased it for sure.
secondly, i've only mowed with it 4 times so far, a total of about 2 acres or so. i mulch the grass, haven't tried out the bagger or side discharge yet. having said that, my two favorite features (and what sold me on this machine) are the mow-mentum system, and the one lever four corner height adjustment. i had read about the mowmentum online, and didn't have high expectations for it to be honest. i tried it at the local dealership, and it is awesome!! seamless performance, instant response, from a slow crawl if i see something shiny and get distracted, to an (almost) jog if i'm on a straight stretch. the rear wheel drive is nice also, i prefer it now to front wheel propel.
if i wasn't clear or if anyone has more questions, please feel free to ask!
oh, and the 36 was $399 american and the 46 was $499 american. 26 was $349, if anyones interested.