well, the first thing is dont do anything till the UNHRC is over..If the outcome is positive I'd still opt with my first option which is to convert..It's highly unlikely that the exchange rate will go over 135 rupees..It'll trigger another balance of payment crisis and I dont think CBSL would let that happen once again..Its a good sign that they increase the price of petrol and diesel..(And I'd like to see a hike in electricity as well). I saw some article in LBO today and CBSL is planning to relax exchange controls..
http://www.lbo.lk/fullstory.php?nid=965747130
So finally my conclusion is to convert..(Don't blame me if things go the other way, I'm not Harsha De Silva nor have a Phd in Economics)