Thanks a million for the advice guys. I really appreciate it. I don't mind waiting my turn for upgrade but like most I hope it will come sonner rather than later. (Listen to me I havent even got the job yet!).
Seems from what you are saying there would be no advantage at the moment for a B737 guy to go B777 and likewise an A320 guy/gal to go A330. The wait will be the same.
I'm current on Boeing A/C at the moment. I know that they don't offer a choice but its nice to at least know whats what.