I am considering taking the DIY plunge and am considering two options: 1) Two EBS Shivas to be used as stands for my mains. 2) Single EBS Tempest placed in a corner. I have an oddly shaped 4300 ft^3 room with vaulted cielings that is open to the kitchen, and I am somewhat concerned about the two sub option complicating my room response. There seem to be many conflicting opinions regarding apropriate placement of multiple subs. I would apreciate any words of wisdom regarding the use of dual subs as stands. I realize that the Tempest option would be less expensive. Thanks.