To be honest reaper x64 has bridged all my 32 bit plugs/VSTI's perfectly, reaper x64 is running like a dream here.
I have;
EW PLay
Kontakt 4
guitar rig 4
Massive
absynth
FM 8
Garritan Steinway
Halion 3.5
Vienna pro
PSp SQuad
reverberate
Nebula Pro 3
all running natively X64 so I've only a few plugs/VSTI's now that need bridging
MC