@Guy Betsy - thanks, I wasn't sure if using BA miles on CX would qualify to use CX lounges. Makes sense though. Nice to know my folks will be able to wait in comfort. I also like your idea of one way first, one way business.

@cxfan1960 - thanks for the info. I'll let them know so they don't have to ask around. Will be nice if they can board from the lounge - how convenient!

@Santander - oh dear! Now you've got me worried...how will they go back to 2-3 trips a year to Asia in coach?!?

I've got another question...say I book one way first and one way business. Which way for each would you all recommend?