Did you mean "what should I expect if I decide to use the Velodyne"?

You might want to download the Outlaw's Guide to the SMS-1 from the SMS-1 product page and by reading the setup process you might get some ideas of what to expect and what it is supposed to do.

If you went as far as dedicating a room to HT, you should get both the SMS-1 and whatever sound treatment you think would help. That's just my opinion.