A/V Receiver for B&W matrix speakers

I’m trying to convert my stereo system into 5 channel HT. My current system comprises Toshiba SD-9200 DVD player, Audible Illusions L2 preamp, Musical Fidelity A3Cr amp and B&W 802 matrix speakers. I’m planning to use HTM matrix for central channel and 804 matrix for surrounds. I’m thinking about either buying AV receiver for processing signal and driving center speaker (not a very bright idea) and surround speakers or buying processer/preamp and three channel amp. I’m not sure if I really need processor since Toshiba has a built in digital processor.
I don’t want to spend more than 1k and at the same time I need the system that would allow me to listen to my current setup without switching cables.
Any thoughts?
Thank you.