This is what I do with my system - although I ended up resorting to horizontal biamplification to get the most of it. So Duke is right on - if your speakers are efficienct enough, there is no problem. But as I find out with my JM Lab Electra 926s, tube amps will sound completely different with a nice load (like the top end of my speakers) compared to giving them a large 3-way with double woofers (full-range operation).
Arthur
Arthur