Would have to say Technifibre Black Code is the best bet for the money... sadly it's still an expensive string.
It's not that much u'd have to pay for shipping you know... I live exactly half way around the world from the States and a reel can be shipped here for $5. IMO this would be the better option because you can get strings that are amazing value for the money... $90, $100 reel strings that perform just as well or better than the $150 and $200 that these brands u have locally offer.
A few notable powerful poly are Cyber Blue ($80 a reel), PolyStar Energy ($97) or Genesis Black Magic ($85)