6x9 sub

Trying to pick out a pair 6x9 subs that would run off a shared 200W at 4ohm sub channel in my rear deck. Love the price on Tang Bands (Tang Band W69-1042J 6"x9" Subwoofer 264-837) but it says they run at 8ohm impedance... would that mean they'd only be getting 50W per speaker? Also looking at...