I was going to buy a 3-way bookshelf speaker that has an 8 inch woofer and goes down to 40z. Someone told me to save a hundred bucks and get the 2 way speaker that goes down to below 65hz because I have a Hsu Subwoofer and that I won't be using the lower frequency of the larger speaker. If it helps I'm talking about the Cambridge Soundworks M80 and M60. I have their center channel that has two 6 1/2 woofers a 3 1/2 midrange and the same tweeter. I'd love to save the money if this is true. Thanks!