You negotiate your terms when you are spending billions of dollars to procure a fleet of advanced fighters, RSAF needed to be upfront bold and not settle for anything less then those westerners are/were getting. The point is you government needs to break the shackles of always being late and settling for the same old. Tell them we want this we want it to be on par with that if they agree well and good if they don't move on and settle for something better, I still take Typhoon a better choice in 2011 then those F-15s, A really premature decision on part of RSAF might involve kickbacks.
It is time to move away from F-15s and choose a generation ahead platform F-15 wasn't a right choice, you know what will happen when US offers you F-35? Isrealis will have mastered the platform already when it is in your hands as a new born this is a severe disadvantage. Remember how clinton administration refused 100 F-16s to RSAF, you government had the chance to either refuse F-15s or ask for a better platform you people were in driving seat not the US.