I neither use Themeforest - I have not analyzed the code of the themes which are offered over there, but I do not like the licensing which is offered by TF and personally I dont like Themes which offers 100 different features where from 80% are not needed.

Here in Germany a lot of Bloggers use the themes from http://www.elmastudio.de/en/ - The themes are minimalistic, decent priced and I would say properly coded. Maybe this is something for you guys as well.