I bought a 60" King Kutter II for my TC 33DA a month or so ago.
I've only used it once, to till a 50 foot by 75 foot experimental growing patch for my wife. We have heavy clay soil here, and it handled that soil like a charm.
We were really pleased with its performance.
Lowest price I've seen for it was at Tractor Supply Co. I think it was $1049, or something like that.
I paid more for mine, but that was because I bought mine from the same dealer that I bought my tractor from, and it was part of an entire package that I bought. I figured that even though it was more expensive from my dealer, at least that way, if something went wrong, responsibility would fall into my dealer's lap to help me. (I didn't want a situation where I'd call the dealer for help and he'd say he couldn't help me cuz the tiller came from somebody else, then I'd call that somebody else and they'd say they couldn't help me cuz they didn't sell me the tractor, and so on.)