jbl w12gti’s

so ive nearly gotten everything for my system....except the subwoofers i want...

so far i've gotten:
pioneer deh-p780mp
hifonics titan 200x2
infinity reference 6022i 6.5 2-ways

and a hifonics bxi2006d

i originally planned on 2 kicker l7's but after some research, i've decided i'll spend a lil extra and get the jbl w12gti's and im pretty pumped about it, on to my question though...

hifonics claims:
1-Ohm Power Rating 1x2000
2-Ohm Power Rating 1x1300
4-Ohm Power Rating 1x650

according to my half-assed calculations then the amp should be "claiming" 1650 watts at 1.5 ohms. From what I read hifonics are good bang for your buck amps, but overrated so im guessing maybe ill be getting 1200-1300 rms?(please correct me if you know otherwise) and im very concerned that it wont be enough to push these subs hard enough. I've spent a lot of time designing a box i think should sound good and it's a daily driver, but i'd at least like to get into the 130's . Is it likely with that sub/amp combo or should i consider doing something different? I'm pretty set on getting these subs but if any of you experts here think ill be completely wasting my time let me know. -thanks.

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2001 Chevrolet Tahoe

Waiting to be installed:
Infinity reference 6022i 6.5 2-way
Hifonics titan txi 4006
Hifonics brutus bxi2006
Pioneer DEH-P780mp
Waiting for my paychecks :(
(2) Jbl W12gti

Are you planning on running the JBL's sealed or ported?

ported, tuned to about 30 hz.

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2001 Chevrolet Tahoe

Waiting to be installed:
Infinity reference 6022i 6.5 2-way
Hifonics titan txi 4006
Hifonics brutus bxi2006
Pioneer DEH-P780mp
Waiting for my paychecks :(
(2) Jbl W12gti