Congrats on the monitors.. Did you get the .v4 or Newer model .v5's ?
I would as well as many others here will strongly suggest you get a matching Center Channel for timbre equalization across the front 3 speaks..
Look for another Monitor series Center... The New monitor 290 & 390 are getting great reviews.. and with the savings you got with those 7's would be worth it to swing for them...
Check online for subs.. best bang for your buck.. SVS, HSU, AXIOM just to name a few... I just got SVS for the prettiness factor, as well as the gut wrenching bass..
Warp