Does investing in an expensive subwoofer make sense if I'm gonna run it at low?

I live in an apartment. Currently looking at the SVS 1000. My landlord said a subwoofer is okay as long as I use it responsibly. I live on the 2nd floor in a carpeted apartment. If I'm going to run it really low, should I aim for something a little cheaper? I'm only planning on using it to watch TV and movies really.