Kirby needs to see his buddies at Lesco..LOL. The 42" aerator they sell is top notch and does as good of a job as a walk behind in my humble opinion. Anyways I use a 60" Dixie Chopper Flatlander. Wish I could find a $500 mower that ran didn't cut and had a 3pt hitch that someone was just trying to get rid of.
I use a John Deere 430 diesel garden tractor with a 3 point hitch. I use a Classen sold by Lesco which has a 3 point set up or a tongue to pull it with. With a 3 point hitch, hydrostatic drive and power steering, it makes aerating one of my favorite jobs. You can put on several hundred pounds of weight on this aerator to penitrate hard ground and the transport wheels can be turned into depth gauge wheels so it don't sink in too deep in soft areas when weighted down. If anyone has this aerator and is interested in how to set this up to use the wheels as gauges, email me for details or if enough are interested, I'll post directions and a closer up picture of it than what is on my website. I like inventing things.
I use a John Deere 212 to tow a 48" Millcreek. Works well, however I'm going to make me a hitch setup for my Lazer so I can just use that. I probably won't be able to reach the lift handle, but I'm sure I can fabricate something for that too. I can only WISH I had a 3 point!
We use an arrangement similar to Eric's but instead of the JD we have a Boomer 21D by New Holland. It is one of the most versatile piece of equipment we own. With the 3 pt hitch we also use the following implements: post hole auger, 48" brush hog, TR3 Landscape Rake, and a 3 pt hitch pallet fork. We also have it equipped with a front end loader and will be getting a backhoe for installing ponds. Its amazing what the little thing will do.
I use a Kubota B7400 4WD hydrostatic trans. compact tractor with turf tires and a Ryan 3pt hitch tow aerator. I'm using oversize tires for flotation and weight. The aerator weighs approx. 725/750lbs and gives at least 31/2 to 41/2 in. cores. This set-up seems to work well in this area and save alot of back work. Oh yeah also looking at a Ryan 19" w/b for some of the smaller sections of properties.