You could stick with either VBA 1.7.2 or 1.80b3 - i consider these builds as WIP and for testing
Oh, and there is still No$Gba, it should run quite fast on slower computers. (And runs a feq games better, especially sound-wise, but lacks flash 128k support

)
Oh, and i forgot: You can always change the flash size to be 64k

And it even will be saved if you restart the emulator. Isn't it cool?