You're going to be happier with the style with removable fingers. If you can, the ones that allow you to slide the fingers is a bit more flexible than the ones where the fingers bolt into set positions.
Do you know the thickness of material you plan to work with?
With these style of benders, there is not a lot of adjustment for radius of bend. The upper die set should be moveable front/back to adjust for material thickness, which gives a small amount of adjustment to the radius of the bend. However, you're not going to get a 1" radius or 2" radius. I did make a rolling bender/folder that I was able to make a 1" radius bend, and could swap out dies to do a ~3" radius bend. See more here: http://www.homemadetools.net/forum/l...tmetal+rolling

Any examples of the types of parts you plan to make with it?

Offset bends don't work with these types of benders. Z-bends or bends in opposite directions are also difficult or impossible depending on the dimensions. For those, the Leaf needs to also have removable fingers.
But if all of the bends are in the same direction, ie, all are up, then it all works good.