The tough thing is trying to find ANY good FAI blades for ANY model from a US source.
From what you have available, I'd try to find the heaviest pair of SAB 600 or 620's that you buy. They have a pretty stable symmetrical airfoil. I've also flown the Thundertiger blades. They tracked pretty well and weren't pitchy in FFF. Again, look for the heaviest set you can find.
In general, you'll want to avoid any blade advertised as having a lot of "pop" or "bite" as these characteristics are often consistent with blades with more aft chordwise CG's.