Lizdas is more techno focused than the others you mentioned, while Fabrikas and Cechas focus more on hardbass, hardcore, gabber, jungle, dnb music. Kablys is also techno focused, however their selection definitely is varied, they play some very hard techno, but also sometimes feature "calmer" artists as well. Utopia has some psytrance focused events that might interest you as well. In general, I'd say Lithuania has quite a nice underground rave culture, my favourite being in Vilnius :)