Tiësto is definitely a great DJ, but I don't really like his own productions that much, and personally I focus more on producers and their tunes rather than DJs and sets. Suburban Train is a decent track from tiësto but there are too many other great tunes to listen to.
My favourite producers would be Ronski Speed (mainly for his remixes), Above & Beyond, Galen Behr, Mesh, M.C.T.R., Kaste, Ferry Corsten and various other random producers in the same ballpark.