The only way you can really listen to SVS speakers in person would be to drive to their offices (I think they are in Ohio), or find someone on the forums near you that has them.
I am just outside of Salt Lake City, so if you are close to me you are welcome to come over to listen.
Internet direct is not for everyone. You will definitely get more bang for your buck as you are eliminating the middle man, but if you are reluctant to buy something you cannot listen to locally, then don't
That said, the reason why people recommend companies like SVS, HSU, Axiom, Emotiva, eD, etc is because they have good reputations, good customer service, and offer excellent products for their price.
When I first ordered a subwoofer from an internet based company (Elemental Designs or eD) I was a little reluctant. But the eD sub lived up to its reputation. It blew away the subs I heard (in the same or close to the same price range) at Best Buy and several local audio stores.
So when I ordered my SVS speakers recently, I was a little more confident this time. And you can return the speakers back to SVS for your money back. You will just have to pay the shipping.