This is for a possible purchase by the Philippines on new Fighters. The Contenders I have found are the Saab JAS-39 Gripen, Mcdonnell Douglas/Boeing F/A-18 Hornet and General Dynamics/Lockheed Martin F-16 Fighting Falcon.
Take Note this is just a rumor but may be possible since the new aircraft the PHAF Purchased are meant for Training purposes on Supersonic Aircraft.
Saab JAS 39
The JAS 39 is a Single-Engine fighter produced by Saab in Sweden. This was made to show the world that Sweden is virtually independent of either East or West for combat aircraft.
The Gripen can go at Mach 2 at high altitude and was built so that it is easy to purchase, maintain and fly.
Mcdonnell Douglas/Boeing F/A-18 Hornet
The Hornet was a 2-engine multi-role carrier fighter produced by Mcdonnel Douglas, later Boeing, for the US Navy and Marine Corps but was later purchased by Australia, Kuwait, Canada, Spain, Finland, Malaysia and Switzerland.
The F/A-18 is practically the same as the Gripen but the Hornet shows better Survivability by having 2 engines and 2 Tails and the ability to carry more weapons but at the same time is more expensive.