I have a Bitcoin machine running W8 Pro, Radeon 7850 + 7970 and CGminer 2.11.4
I am looking for finer tuning suggestions, and wanted your thoughts as to what you think I may have overlooked or should consider trying. Of the configs I've tried the following seems to run the best, but I'm sure there are more refinements I've not tried, including worksize.

Here is my Config:
"intensity" : "15,15",
"vectors" : "1,1",
"worksize" : "256,64",
"kernel" : "diablo,diablo",
"lookup-gap" : "0,0",
"thread-concurrency" : "0,0",
"shaders" : "0,0",
"gpu-engine" : "800-1100,900-1100",
"gpu-fan" : "0-85,0-85",
"gpu-memclock" : "1180,1190",
"gpu-memdiff" : "0,0",
"gpu-powertune" : "18,18",
"gpu-vddc" : "0.000,0.000",
"temp-cutoff" : "95,95",
"temp-overheat" : "85,85",
"temp-target" : "75,75",
"api-port" : "4028",
"auto-fan" : true,
"expiry" : "155",
"failover-only" : true,
"gpu-dyninterval" : "7",
"gpu-platform" : "0",
"gpu-threads" : "2",
"hotplug" : "5",
"log" : "5",
"no-pool-disable" : true,
"per-device-stats" : true,
"queue" : "1",
"scan-time" : "60",
"temp-hysteresis" : "3",
"verbose" : true,
"shares" : "0",
"kernel-path" : "/usr/local/bin"