i'd recommend going with a si motor if you are on a budget, or even an LS. I don't even think the ZC ever cam with a hydro trans, I may be wrong, but thats what I remember. SOHC VTECS can be found for almost as cheap as ZC's if you look around.
http://www.thepartstrader.com/Single...D=130&PCID=130
http://www.thepartstrader.com/Single...D=130&PCID=130
I had a friend that used the CX tranny with his si swap for awhile, then traded it for an Si tranny and said it was like night and day, so that might be another thing you want to consider.