The Israeli Merkava is heavy. Although, Middle Eastern terrain is completely different from South Asian or even South East Asian terrain. So, light and medium tanks are good.
Regarding Burma, I am sure India is a staunch supporter of the junta for obvious reasons.
As far as aircraft is concerned, even Bangladesh's national carrier - Biman could barely procure enough aircraft for its operations. Even the air force is very limited and somewhat underfunded. It's not just because of lack of money - it's mainly due to lack of organization and destructive politics both in Biman and the military.
I'd go for Western aircraft any day. Chinese option is limited since their ability to produce large numbers of complex aircraft for export and done so quickly are limited at the moment.