Hi guys,   Newbie to the 5.1 home theater speakers scene. I've auditioned about 2-3 speakers for my price range (5k-ish -inclusive of speakers,cables,sub,amp etc) and am about to commit to this setup:   Imgur IMGUR.COM Post with 1 views.   However I've read about SVS PB-2000 subs and since they're on sale now ($1225), I was wondering would it be wise to replace the Krix Seismix 3 MK7 (Not sure what the difference is wit