If I was consistently running a DI to a decent FOH supported by decent monitors, I really wouldn't be that bothered what I used.
But while I'm rely on what's behind me for my own enjoyment of the gig, it's got to be something tactile for me. Solid state seems to have it, with or without tubes (I'll politely skip my thoughts on the commonly available Class D heads I've tried), but the WB100 valve head took it up a gear - it was so quick and responsive. It was like a direct connection from my fingers to the back of my knees.