I have a Monfratto 475 tripod with, what they now call, a 229 head. In earlier years, it was known as the 3039 head. Great combination, but they've creeped up in price. The thing I like about this tripod is that each leg can be adjusted independently. Or, they can all be adjusted together. This makes it really good for landscape photography.
As for the tripod, it will hold an 8x10 Deardorff very nicely. Much above that, like the heavy Calumet 8x10 C1 or C3 (or whatever), and it's not quite sturdy enough. They would work; but, the tripod is not quite sturdy enough.