I recently purchased a pair of JBL LSR305's. I have them connected to my Creative ZXR sound card in my PC using two RCA male to XLR male cables. I'm thinking of purchasing either a PB-1000, LV12R or the VTF-2 MK4 subwoofer. How would I go about connecting the JBL's plus one of these subs to my sound card? Which subwoofer would you fine folks recommend? I game a lot, listen to music a lot and I love watching movies.