Pilkar,
You already have a JBL bottom end 15", the 2425 will mesh just right together. Other than if you mentioned a Altec driver for same money, and even then is only personal preference between the two of them, if you were wanting to break the wallet, I have heard that TAD is the best out there. Of course I am partial to the JBL/ALtec combo as that is what I have. I have run my drivers on:
Altec 811B's/511B's, Edgarhorn and Martinelli, last 2 are solid wood horns which I like very much.
Just take this as my opinion, I hope it helps you out :-)
Ron