Thanks, all, for your replies ... Rich, I'll check those threads.
I know it all too well ... that's why I phrased the question "given the choice between a Deep 4/5 and a mouse"
. I have acquired a beaten up upright, and an EUB, but I'm starting to wonder if they'll either of them ever make it to a gig. (Two reasons, time required to acquire the chops, and the practicalities of gigging with those monsters.)
.
{SNIP} ... but realize that if you want an upright sound 100%, you'll have to play an upright. Even EUBs like the NS Design ones sound like fretless basses more often than not and not as organic as a real upright.
I know it all too well ... that's why I phrased the question "given the choice between a Deep 4/5 and a mouse"
.

He even emailed me pictures of models with options similar to the kinds I was inquiring about. He's a great guy.