+1
Tube amps also seem to sound a bit more powerful for their wattage, but the most obvious strength is when pushed. You do not want to plan for pushing your amp.
High powered amps cost lots of money, worth it if you can afford them. Just my amp have over $1200 in tubes.
Definitely start with the best tube preamp you can get. That is how I started. I would look for a used, the best you can stretch to get. It can be the center of your system for a long time.