underpower

I know the sundown x12 is 1500rms. I been using a jl12w7 which is 750Rms with a jL600.1v3. i totally understand I'm under powering but eventually I want to upgrade the amp to jl hd1200.1 and alternator but not anytime soon. I'm just tired off my w7 and want spl. I was wondering is there going...