I really like the sound of my current speakers (TSI400). I'm wondering if it would be worth it to upgrade to the A5 speaker system. The A5 has two 6" woofers instead of the three 5" woofers in my TSI400. Would the 6 inch woofers give me a bigger, wider sound than the three 5" woofers. I think the tweeters are probably the same in both speakers. I see that if I buy the A5 speakers from Crutchfield I get a free subwoofer. That seems like a good deal to me. I just wonder others think who are familiar with the TSI400 and the A5 speaker system.