I have a 2x 10" Kicker Upfire box, and I love it. It's nice to be able to sit at a stoplight for a second, and take a peek back seeing the subs working. As for sound quality, I know that it does help to have rear firing, but unless you're going for SQL or dB competitions, the difference will be barely noticeable if at all.
Only thing I can recommend is to tint the rear window if you can, so people looking outside can't see your trunk and think about stealing it.
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Bonnie - Stage 2, Audio build coming this fall!
R.I.P. Abby 3/29/10 - 3/30/14
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