Joe,
If you like the sound of your amp do not think about changing that variable right now. I can reassure you the DI's perform well with all sorts of electronics as this thread points out. Their efficiency allows the option of low powered SET gear but hardly demands it. I've listened to both tubes and higher powered SS gear. While I appreciate the virtues of both, overall I prefer my Marantz Reference integrated.
If you like the sound of your amp do not think about changing that variable right now. I can reassure you the DI's perform well with all sorts of electronics as this thread points out. Their efficiency allows the option of low powered SET gear but hardly demands it. I've listened to both tubes and higher powered SS gear. While I appreciate the virtues of both, overall I prefer my Marantz Reference integrated.