Fun question
I might choose Surf's Up, Left in the Dark and Nowhere Fast if they were going to be done closer to what they were originally on Bad for Good / Streets of Fire. I've never really been happy with Meat's production of these ones. Maybe Read Em and Weep or I'll Kill You if You Don't Come Back, too. They're two of Meat's best songs which could be vastly improved in a modern studio (particularly IKYIYDCB). Not to say that they're bad now, but they'd be incredible with audio quality that was on par with HCTB.
I think I'd choose If It Ain't Broke, actually. Just because I don't really have any significant problem with any of his other songs, and this one was badly abused during it's caesarean section from (It Hurts) Only When I Feel.