The is very good advice if they're the OP's only options.
The JBL center you want should have a fine timbre match with the Venue speakers. However, if I were you, I'd try to save a bit more and get a nice set of Studio L series from JBL. They are much superior to the Venues. (Are you wanting this line for its size or looks?) Even the E-series would be superior, IMHO, and is on close-out pricing around the net as it has been discontinued.
And I especially agree with alexsound's advice on a subwoofer. I've had JBL subs and they choke. An Hsu would ultimately make you MUCH happier.
Happy hunting. Whichever way you go, actually getting a new setup is always a wonderful joy!!