i have a new holland 452 disc mower and a disc bearing went out last year. i had to spend a lot and the mower was out of commission for a lot of second cutting. i have an old ford 501 mower that many pieces are missing from and really isn't field worthy. i want to keep the disc mower because - frankly - it's bad *** when it comes to mowing think stuff which i have a lot of. I'm in the mountains of western nc and were basically a rainforest so there is some very thick hay. but... i want a backup and something to mow my steep hay land with (the disc mower is so heavy that the rear end starts sliding on some of my ground on my 4WD New Holland TN-60A). What should I get? I saw some NH 451's yesterday that seemed very overpriced. Cheapest was 2200 and most expensive was 4700 - all used. Then I saw some NH 450's that ranged from 1300 - 1800. more what i was thinking. any other suggestions? is a 451 that much better than a 450 and is a good 501 something that can mow hay well? I don't like the five point hookup because it doesn't match up to my tractor w/o modification. thoughts?