Tonally matching rear speakers or close to it?

[Sneakypete]

Hello all, I was looking for a little help on finding rear surrounds to come close to matching my main speakers tonally. Front mains are DCM Timeframe 600's with matching center channel.

Specs on the mains are.
Sensitivity: 92db/1 watt/1 meter
Useable Power Range: 5-250 watts
Impedance: 6 ohm nominal
Frequency Range: 30Hz to 20kHz
Enclosure Type: Transmission Line with rear firing port
Driver Complement: Two 6.5 inch drivers and Three .75" soft dome tweeters, per speaker.

Center channel has Two 4" drivers and One .75" tweeter.

List of other equipment.

Marantz SR7000 Reciever
NAD 916 Amp
Marantz SA8260 SACD Player
Toshiba DVD Player
Toshiba 42" HDTV
DCM Time Frame TF600 Mains
DCM Matching Center Channel
Sunfire MKII Sub
2 Mirage BPS-150i's

Any help would be apprieciated.

Thanks Pete

This was posted in the Hmome Theater topic to, but this seems like a better spot for it.