Using a price search engine, the prices of Noctua's NT-H1, OCZ's Freeze and Tuniq's TX-2 were approximately the same price. Arctic Silver's Ceramique was the cheapest of the bunch, and I could not find pricing on Stars-700.
Arctic Silver's Ceramique didn't perform as well as any of the other thermal compounds we tested. It requires a curing time to achieve it's optimal performance. It was however the cheapest thermal compound by a small margin, and it's wide operating temperature range allow it to be used with extreme cooling methods. For most users though, there are better options available.
The Stars-700 performed well, and although I could find no information on pricing or availability, if you get this thermal compound packaged with a heatsink you purchase, don't be afraid to use it. It performed well, even better than the premium compound Ceramique.
Tuniq's TX-2 came in a close second. It was just 1 degree celcius away from the top of the pack. It doesn't require a curing time after application and isn't electrically conductive. Tuniq's TX-2 earned a Silver Award.
Noctua's NT-H1's performance led it to the top of the leaderboard. It doesn't require a curing time after application and isn't electrically conductive. It earns the Editor's Choice Award.
OCZ's Freeze had the absolute best performance of the thermal compounds tested today. It doesn't require a curing time after application and isn't electrically conductive. OCZ has a great distribution network thanks to its widespread memory products, which should make Freeze easily available. It earns the Editor's Choice Award.