I'd give the edge to the JBL just from specs. Eight inch subwoofers are barely subwoofers.
If you only have $200 to spend, the JBL looks like a nice deal, though I'd recommend waiting until you can save up $500-$600 at minimum and get a nice powerful 12" from Hsu, Rythmik, or SVS.
HT: Sony 940C, Oppo 203, Harman/Kardon DPR1001, Infinity Interlude IL40 x2, Infinity Interlude IL36C, Infinity MS-1 ii x2, Infinity MSW-1
Computer: Elac Uni-Fi UB5 x2, Elac Element EA101EQ integrated amp, SVS SB-12NSD
Dedicated 2-channel: Infinity Intermezzo 4.1t towers, Bluesound Node 2, Emotiva PT-100, Crown XLS 1502, Furman PL-8C