Verizon FIOS TV with TWC internet - Need "Quantum Gateway" router ?

I am getting FIOS TV for my two Roamio's (plus cablecards).



I'm keeping the Time Warner Cable internet as my internet provider.



I have the TWC Motorola cable modem plus the top of the line Ausus router.



I'm arguing with Verizon whether I really need the Quantum Gateway, which is normally $9.99 a month.



Anyone?