I've read 3 books by Dostoevsky, Crime and Punishment, Demons and The Brothers Karamazov. TBK's my favourite. When I first read C&P, I read the Constance Garnett translation. I found the book to be OK but a little slow. Later when I read the P&V translation, I some how found it to be a faster read. I guess the translation that you try (provided you are not reading the original Russian) matters as far as reading enjoyment goes. I would say C&P is a faster read (as far as I remember) compared to TBK. I think it can be a good starting point for trying out Dostoevsky. And yes, The Master And Margarita is definitely amazing.