Hi Mayhem,
The problem you going to have is getting either the best gt fishing or the best doggie fishing, in my opinion oman is going to be the best place to get your true trophy gts, im talking 50+kgs, the jigging there can also be very good with some proper size ambers 30+kg and all sorts of travelly species,bottom species etc, you will have an epic trip either way.
In terms of doggies I havnt seen a better place than the seychells, but I also havnt been to latham where everyone knows there are monsters!if you can organise a trip to one of the remote attols of the seychells then you are in for a treat with amazing jigging and popping opportunitys, just be sure that the operation you go with is not only a fly fishing company, because they wont have all the marks and experience required for j and p..
chat to cam mundy on the site if you need to know more about oman, he is currently running the operation there!
cheers