Need advice on CLX surround system

Is it necessary to go electrostatic with side speakers in a CLX 5.1 audio setup? I stumbled on a great deal on a Stage center so I'm thinking of expanding my 2 channel CLX setup which also consists of two Descent i's... I'm looking for something inexpensive (since this "thing" is just a whim") and don't want to go with anything too intrusive. Also, I really don't like the looks of the lower end Martin Logan line but might have to settle for a Prodigy or Vantage. Intrusive. The discontinued wall mounted Scripts seemed like a possibility but I'm sure they wouldn't have the presence that would be needed. Any good suggestions would be appreciated. Maybe I should just dump the Stage and forget it. Don't know....