If you remove 20-100Hz from the chain there is still much left, so I don´t know if I agree when you talk about waste of money.
Anyway, I am considering a line source speaker at the moment to replace my 20Ts. It has no crossovers and starts to roll off just below 100Hz. I think it will be a perfect match with my Aerial subs in my room. These line sources are incredible dynamic and throw a huge soundstage. Scary realistic sounding. Sorry to say, but I think they perform quite a lot better than the 20Ts. I have not made my decision yet, but I´m waiting for an offer from the dealer.
Anyway, I am considering a line source speaker at the moment to replace my 20Ts. It has no crossovers and starts to roll off just below 100Hz. I think it will be a perfect match with my Aerial subs in my room. These line sources are incredible dynamic and throw a huge soundstage. Scary realistic sounding. Sorry to say, but I think they perform quite a lot better than the 20Ts. I have not made my decision yet, but I´m waiting for an offer from the dealer.