PTseller im using saphire & MSI 280x's for scryptcoins. Getting 730mhs out of each sapphire. 700 out of the MSI.
Config:
setx GPU_MAX_ALLOC_PERCENT 95
Sapphire
cgminer --scrypt -o stratum+tcp://..... -u USERNAME -p PASSWORD --intensity 13  --gpu-threads 1 --thread-concurrency 10240 --auto-fan --temp-target 80 --gpu-powertune 18 --gpu-engine 1040 --gpu-memclock 1500 --gpu-vddc 1.00
MSI
gpu-engine 1050.

As far as availability, both are very easily available in nehru place. I got one this past friday.