I just spend some time on youtube and found some cover of the title music which I liked, it's the Sherlock theme heavy metal style:

https://www.youtube.com/watch?v=7yr_we6IvyU

And there is also one of Dr. Who :D (which I maybe liked even better than the Sherlock one)

Now I know it's not everyone's taste of music, so do you have found other versions of the Soundtrack songs which you liked? 

(hope this is the right place for a thread, but as it's not really a fan "video" (as it's about the music only)...