Which GUI is best for testing 64 bit engines?

[Rubinus]

....
Chessbase for Zap!Chess... x64

And Fritz 11 for UCI 64bit ...

[beachknight]

Thanks, Pavel.

F11 GUI added to the list as well.

Best,

[beachknight]

Hi Tony,
and Albert and Graham,

I have just completed first x64 tests on Arena 1.1.

You all were right. Not a single error or crash
of Arena 1.1 in 200+ games in three days.

So far, the GUI list pre-tested in order of preference:

1. Arena 1.1

2. WinBoard64 JA

Best,