Hiya there, new and quite newbie poster. The sub in my Onkyo system I bought refurb a few years back finally died. Can't get any power to come on, and nothing looks blown. But instead of trying to get it repaired, I thought upgrading or at least replacement would be the higher ground... My receiver is a TX SR600. I'm looking for any clue ins on what to buy here... looking for the low end of things price-wise, sub-$200ish range(small room anyway). Thanks in advance for any help/suggestions!