I also have the 755 and (2)200 combo (pushing the 990) in a 7.1 configuration - I've tried the 200's running the rear surrounds and the front LR mains, and couldn't really detect any difference...you do get an extra helping of spaghetti in the back of your rig as compared to the 7700, of course
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Integra DRX 3.1, Outlaw 5000
Fronts - Golden Ear Triton 2, Center - Martin Logan Motion 8, Surround L/R - Energy Audissey A5+2,
Sony XBR65X850E
Oppo BDP-83, Sony UBP-X800
Roku Streaming Stick +
Music Hall mm5.1 table, Ortofon 2M Blue Cartridge, Cambridge Audio 640P Phono Preamp, Pro-Ject Speed Box
Belkin Pure AV Power Conditioner
Audioquest Type 8 speaker cable, Monoprice speaker Cable
Mostly Monoprice interconnects