I know the W15Gti subwoofer doesn't get much love here, but in my opinion (after having owned the 2235H, 2245H, 2241H, and 2242H) its just as good as the rest of them.

The only thing that bothered me about the W15GTi subwoofer was that the Mkii had a silver dust cap, which I found really ugly.

I now own a single JBL W15GTi MKI for movies/music and I think its a fantastic driver.