Hmm how long is your long term?
BTW you sure you going Burma at this period? A bit unstable don't
you think and furthermore the monks and Buddhists are also involved
in the political situation... 
Well things might get better next summer.
By Dharma Dan (note that the prices here do not apply for us
because Dharma Dan lives in America and therefore his air ticket
costs much more):
http://web.mac.com/danielmingram/iWeb/Daniel%20Ingram%27s%20Dharma%20Blog/The%20Blook/DAA4B1E6-928C-46F1-AB7D-D6B637600C2C.html
...Some of my favorite places to go on retreat are: The Insight
Meditation Society (IMS) in Barre, MA, Bhavana Society in Highview,
West Virginia, The Malaysian Buddhist Meditation Centre (MBMC) in
Penang, Malaysia, and Gaia House near Totnes, England. Also worth
mentioning are the Mahasi centers in Burma (Myanmar), such as
Panditarama in Yangon (formerly known as Rangoon). All of these are
easy to find on the Internet. For those who are really into Mahasi
Sayadaw style practice as I am, the Three Month Retreat at IMS
(about $3000), or a few weeks to months at MBMC (about $1000 to fly
there and then a few bucks a day to stay) are highly recommended.
Both have excellent food and are very conducive to great practice.
It is amazing the things we spend our time and money doing. As a
good friend once said, If you had to flip burgers for 13 years to
get up the money to do the three month at IMS, it would be well
worth it. I prefer MBMC for cultural reasons, but both are great.
Burma is a great place to go for the real deal, but there are some
issues around dealing with the government, the oily food, the
water, the parasites, and the malaria-carrying mosquitoes that need
to be considered....