C6 & Waves on Mac Pro 64bit questions

i know this topic keeps coming up, but i can’t find any clear answers.

I’m getting ready to buy a new mac pro when the next model is announced.

in my mind, this will be my leap into 64bit app operation and therefore >4Gb RAM for cubase.

have i understood this correctly?

I use Wave plugins which - as i understand it - currently do not support 64bit.

what are the issues?

i understand there is a steinberg “bridge” technology in C6 whichsupports 32bit plugins in 64bit C6.
except it doesn’t really work?

can anyone advise please?