Thanks for all the replies and help, here are a few more questions regarding above postings:
1- Regarding SWUs or similar products, i understand you can use them only with same airline metal, like AA or UA, problem is both of them dont go direct to dxb where i will be going, so they end up connecting through europe, so this way i can upgrade to europe but no beyond, am i right in this/
2- I guess my main question is : how you gurus do it regarding international upgrades, do you buy an upgradable ticket and then try to get an upgrade, but what happens if no upgrades are avilable, then you ened up paying much more for economy class, or you dont buy a ticket till upgrade is secured using SWUs or miles?
thanks