What will I miss in Pro Tools 10.

If I buy a copy of Pro Tools 10 to run alongside SONAR when I need to, besides SONARcentric plug-ins, what am I going to miss on a session with live musicians?
 
I use real time monitoring to create separate cue mixes for my talent.  If I understand correctly, Pro Tools doesn't do that in the native Windows version.  I also use 64 bit versions of VST software.  I'm sure I will have to install the 32 bit versions once again.
 
I've got a 64 bit machine but I understand that it will run in 32bit.  Correct? 
 
I have a UAD 2 Solo coming soon as a rebate for ordering a UA 710.  Will that software run in Pro Tools?