I have a client that requires a system with proximity fobs rather than a remote control keyfob.

 

I have been checking existing cabling and conduits in the house and believe that I will be able to hardwire the remote keypads, although I would still like to maintain wireless PIR

I can only speak from personal experience when it comes to recommeding panels, but the galaxy is an excellent unit. When you say you use texecom, im assuming you normally use the veritas as the premier is a very capable panel.

The G2 range is not as powerful as the G3 or classic range.

But yes the items you have chosen are compatible. The domonial RF system that the galaxy uses is very very stable.