Congrats on the VSA speakers. All the above is accurate info. They do take some time to run in... though I suspect you bought a preowned pair, right? If so it won't be so tedious a process.
Let me kick in what not to do in setting up the JR's. Don't mess with that rear tweeter until you have them where you want. bi wire them. Shotgun works best for me in my system. Get larger spikes than standard. other iso items for them are available. Do one of the two if not both, as the upper cabinet rubber spikes can be improved upon for sure. More power won't hurt a bit with these units. good sound however, can be had with pretty small amounts though. the shot deal is as I understand it a very good one. Even VSA AGREES WITH DOING JUST LOADING THE BASS MODULE. the MK II's come with some lead shot I think. The finish, though not spectacular, is way easy to care for and the matt finish is attractive enough. Keep them off the walls as much as you can... and with a big room like yours, I suggest a sub is in order. Enjoy.
Let me kick in what not to do in setting up the JR's. Don't mess with that rear tweeter until you have them where you want. bi wire them. Shotgun works best for me in my system. Get larger spikes than standard. other iso items for them are available. Do one of the two if not both, as the upper cabinet rubber spikes can be improved upon for sure. More power won't hurt a bit with these units. good sound however, can be had with pretty small amounts though. the shot deal is as I understand it a very good one. Even VSA AGREES WITH DOING JUST LOADING THE BASS MODULE. the MK II's come with some lead shot I think. The finish, though not spectacular, is way easy to care for and the matt finish is attractive enough. Keep them off the walls as much as you can... and with a big room like yours, I suggest a sub is in order. Enjoy.