I wish I could find one that would allow me to use a 70" long bow.[:@]
I like the Ameristep Penthouse blind. Top is slightly domed, but you don't loose much at all. It's 78" wide and 90" tall--biggest blind I know of. No problems at all shooting a 66" longbow from mine--I've hunted from it with my son in it with me, plus his bow, plus a chair for each of us.
Chad