I've got a full Bassani exhaust with LT's, catted X and axle backs. I think mine sounds really good and I get a lot of compliments on it. I don't know how much difference the off-road X would make. I have a vid of it on the exhaust sound board.
'04 Cobra vert Mystichrome
'92 Mustang LX most mods plus Vortech V1
'12 Mustang GT Perm Coupe PW 401A 6mt, elect pack 3.73 (sold)
'06 Mustang GT Prem vert Redfire 5MT 333 rwhp 323 rwtq (sold)
'69 Mustang Fastback first car I owned and all stock