Buy levs for as close to 2.8 as you can - in Borovets the First Investment bank at the Rila Hotel sells for 2.7 comission free - about the best I found on the resort. Marks and Spencers, from other peoples comments looks like a good place to check out for changing currency here.
yep, Marks & Spencer over here and ATM machines over there. We only changed £100 (280 lev) between 2 from M&S before we went and used the ATM's when we got there.