I'm looking at purchasing a new aerator for some small lawns and have been doing some research, but still unsure on to what I need/want. I do about 10-20 lawns around town and really only aerate, power rake and fertilize them. I got a couple kids around town doing the mowing on there own. My old core aerator doesn't even have a name or s/n on it, it looks like its from the 60s, but still worked. I've been checking into Billy Goat and Bluebird, and leaning toward the billy. My requirements are: Needs to be very reliable and do a great job. Needs to be productive, with few breakdowns/maintenance issues. Suggestions/comments?