You should know that £40k DigiBeta Widecreen camcorder looks daft (stretched) when you watch them on a 4:3 screen. Any anamorphic source will.
All video based anamorphic (16:9) sources record a full screen 4:3 shaped image with a 16:9 image in the 4:3 shape. When shown on a 16:9 screen the picture is stretched out horizontally by 33% to look normal again.
If you want to edit widescreen just do it, it doesn't matter if your software understands it or not. Circle shaped wipes will appear oval, and your text may be squashed. You may have to manually set your TV into Widescreen mode, but that's all.
There is absolutely no difference between a 16:9 FH (Full height) anamorphic and a 4:3 recording in terms of image size, data rate, pixel size or shape.