Whats your transmission suggestions?

I am currently running a 318 with a 3 speed auto and a single legger rear end. I will be upgrading to a 408 stroker and a sure grip rear end and probably running between a 373 and 410 in the rear. Havent quite decided. What tranny should I go with? Keisler quoted me a 4 speed auto for $4995. Is there a better route? I definitely want to have a 4 or 5 speed. Thanks!

Robert