thin 13" subwoofers any good?

[Cruzer 10+ year member]

would one of these sound pretty good or would i be better off getting 1-2

8" solo barics L5

http://www.poweracoustik.com/pa2006/product_AUDIO_wof_thin13.html

http://soundstream.com/AudioProducts/Subwoofers/stealth.htm

the only thing i can say about these 13" woofers is it says they play 20-500hz

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[Horsemanwill 10+ year member]

i heard one of JL's TW5s and it sounded reall good.