If the bike is french threaded, then you'll need a french thread BB. Velo Orange makes a nice one.
Another option is to find a BB that could have the cups removed. I did this with a shimano UN72 and bought Phil Wood french cups. Could buy the Phil BB though, works the same way.
If you are english thread, any BB will do really.
Your combination will work. There are other Triathlons with the same setup on Velospace.