Definitely go with the Tanabe, of course it is not the loudest out there...but it is very loud and deep, and the best part is that it that it is tied for the best hp gains from any exhaust out there for the Celica. I have heard the Kazuma exhaust, to me it sounded terrible, it was too loud for one and it just sounded like shit to be honest. And as far as I know the Tanabe Super Racing Medallion is still on sale at www.afsmotorsports.com
for $435 shipped. Which is a pretty damn good deal, retail that exhaust is well over $500 bucks. Good luck man.