CCI,
Thanks - I'll probably end up renting a walk-behind unit. I usually go out of my way to use my tractor, even if it means suspending common sense/w3tcompact/icons/smile.gif.
TresCrows,
Good point. I think I was pretty lucky even to find a place that had the spike aerator/seeder. I was tempted to give it a try, since our lawn could use some overseeding, but the 6' unit looks to weigh in at just over 1000 lb. The guy at the dealership said 'It'll never lift it' when I told him I have a 24 hp Kubota. I'm not so sure he's right - the tractor is rated to lift 1655 lb at the pins and 1300 lb at 2' aft of the pins. I'm pretty sure it would lift it empty, anyway, but it's too wide to get at all areas of my lawn and I'd probably need the loader on and a full bucket to keep things balanced, etc.
I saw the picture you posted of that 4' First Choice aerator that you picked up - It looks pretty nice. I may go that route eventually, if I can find a place to buy one around here.
Rob