Ok, I'm confused.
You stated you were at soundcheck with the "post tube" DI sound.
Then you stated the sound guy preferred the standard DI and you didn't want to ruin his deal because you've been playing that gig forever.
This is where I quoted you, figured maybe next time/different gig
Then you say how great it sounded
Then you say that particular sound guy just runs DI.
Was there more than just one gig here? Because it's stated like you were at a gig, but the guy used DI, but the U5 thingy sounded great, but the guy just used a DI?