Welcome to HU Nicola!
I did the 'Balkans' route last year, it was great! You have a few options further south depending on what bike you are riding, what terrain you want to encounter etc.
I would fully recommend the crossing from Albania to Greece via lake Orchis - well nice. Be warned, Tirana has been described as Hell on Earth by some bikers, and I can see why..... I ended up at lake orchis by being desperate to get out of Tirana and without GPS or roadsigns just went south by using the Sun till I was in the countryside. Best lost ever.
I take it you have joined too late to make it to the HU meet this year?