I am looking for a tree to replace two dying Leyland Ceypresses (I think, because of excess water due to the way my backyard is graded). Very rarely do I have standing water but after a good rain or lawn watering it feels slushy when I walk on the grass where I plan to plant this tree. I am looking for something that will have a spread of about 20' (to screen my neighbor's house) and about 20-30' height and something that doesn't mind somewhat of a wet site. I've considered River Birch but not being dense, it doesn't seem to provide the screen that I'm looking for. I ruled out Willows as I have don't have that much of space and because they have invasive roots. I am considering Dynasty Lacebark Elm as the local nursery indicates that this will be about 25-30' in height and about an equal spread. Does this tree tolerate the kind of wet site that I have? And, can anyone who has this tree talk about the mature size of this tree and its growth rate? I am also considering Green Vase Zelkova for this location. Do you think it will suit the location?

Thanks very much for your help.

Jim