How to merge home theater with 2 channel


I currently have 2 channel but I just purchased a projector and 120" screen. What is the least expensive way to combine home theater with my existing 2 channel. I don't need it to be at the same level as my 2 channel, but I'm assuming I need to match the center channel with my main speakers? My 2 channel system: Jeff Rowland(JR) 625 S2 amp, JR Corus preamp that has home theater bypass, JR Aeris DAC, Bryston BDP2, OPPO BDP-103 Blu-ray player, and Monitor Audio PL500 speakers.
ricred1
Thanks TIC and Soix for your response. I'll install the projector and screen tomorrow. I hope to experiment with your suggestions this weekend and will let you know how it goes. After talking to Oppo technical support, I will run the projector and cable through the Oppo. They said to connect my optical cable from the Oppo to the DAC. 
In your Oppo, make sure you set the DTS Neo:6 mode to Cinema.  I believe this adds virtual surround if you don't have it, but can do funky things for streaming stereo sources.

Also, with the Oppo there is a Tidal and Pandora clients I believe, so if you haven't been streaming yet you will be.

Best,


Erik
Erik,
Thanks for the information. Yes, I currently stream Tidal from my Bryston BDP2. 
The only way I got the system to work 2 jobs is to get another system in another room. 
Same experience as stringreen. I managed to get everything to function but all my efforts to optimize the amazing sound stage my Avalon Acoustics speakers provide suffered a great deal from the presence of the display between the two channel speakers.

As soon as I dedicated a speperate area for the home theater I was able to better space all seven of the now matched speakers requiring much less processor room corection. The sound is better balanced which creates a far more seemless surround effect. I own a small collection of multichannel SACDs and they sound teriffic on the HT system. Understanably not everyone has the room to do this but I highly recomend the seperation if possible.