Is a JL Audio 1000/1 amp really worth it? ?

My birthday just passed and I got some money. The audio shop I go to told me they would sell me a brand new one for 650$, retailed at 1000$. The amp would take place of a JL Audio 1000.1 which I have now. I have a 13W7 and this amp isn't giving me enough power but is 650$ worth the upgrade I would get? Will the bass hit that much harder?? Thanks