JBL ES250PCH SUB opinions

[MADNOD]

Hi all,
i am in the process of building my HT sound system (most probably a 6 month process),
i am planning to get Polk TSI series speakers (TSi500,CS20,TSI100) and a sub to form a 7.1 surround.the AVR will most probably be the Yamaha 663.
i was planning to get a polk sub as well ,the DSW PRO 600, then i found the JBL ES250PCH with a 25% lower price than polk.
i don't live in the states so i am limited to the models and brands that are available here.
i am looking for a medium power sub with 12cm driver, my HT room (which is also my living room) is 14X12 my tv is 52A650 and my player is a HTPC.
can u please advise on the JBL sub quality? is it a good sub?
thanks in advance.