I haven't resawed much Ipe, but I think I recall it being hard, like bubinga. About any blade will cut it if fresh blade, but may dull it quicker than other woods.
I only use 3-4 tpi hook blades , but last Lennox blades I got I wasn't too pleased with. Probably the folks who welded them together off the roll. They had a built in wander.
Here is where I bought the best thin blades, and I somehow ordered 3/4" wide blades last time instead of the usual 1/2" . My mistake turned out to be excellent
http://www.spectrumsupply.com/index.aspxThe wider blade cuts straighter when it starts to lose it's edge on flat grain woods, especially red elm and osage.
Carbide blades last a long time but take a bigger kerf , which matters on expensive woods, and they aren't cheap!!