Bro do keep in mind that '6' series Contis are in the market now, so do consider CC6 or UC6. Similarly Advan dB V552 is here now (replacing V551) so better look out for that. From what I hear, most V552 is smuggled for now.
Personally I go to Zafcom tires on Korangi Road - they also have an outlet in Gizri. But right now Advan dB is not 'properly' available, and if you're going for Contis then best to go to Tire Point.