I've been both ways. Tube on pre, tubes on amp, both and none. My favorite is tube pre and ss for exactly the same reasons everyone has mentioned above. When you get too many tubes in the system, however I find a loss of detail and a too laid back sound. Besides then when one tube goes bad you have to sort through ten or fifteen tubes to find I've not heard some of these new "super" tube amps like the problem tube. And it get's expensive to boot. However, Manley or Wolcott. So my advice would be if you are going on less than 5K budget, keep it cheap all around and do tubes on the pre and ss on amp.
