Yea definitely NOT a Friedman for anything tone wise like old school in flames, or the halo effect etc… that is not at all in the direction you want to go. In flames style tones, especially the older tones, have tons of edge and bite: the Friedman isn’t gonna give you that vibe at all.
Out of all those choices, I’d be going KSR for sure. The KSR amps are just phenomenal, some of my favorite amps ever. The splawn quick rod is an amp I dig personally, but for the heavy saturation and gain structure of especially the newer type tones ( the halo effect etc), it’s not really going to give you the vibe you want here either. Read: this doesn’t mean it doesn’t sound good, not saying that at all. It’s just the saturation is not going to give you that sound or even in the ball park really. But then again, you dig the Marshall ball park, so you may love it who knows.
I know you said you don’t wanna go 5150 but…. There’s a reason all those albums had that amp on it in some shape or form

you don’t need to spend 3k to get those types of tones.
I’d be more concerned about your cabinet choice personally. I can 100 percent promise you, as someone who owns 8 4x12s including an Engl 4x12, and as someone who has IR’s done by Nordstrom himself, that cab is a huge part of that sound. Huge. I’m not even going into the “fredman technique” and all that garbage, I’m talking about the cab itself: for whatever reason those cabs sound the way they do, it’s a huge part of the sounds that came out of nordstroms studio. You mic one up and you instantly hear it: it’s sonic footprint is glaring, and it’s saying “ hi, I’m the real reason those records sound the way they do

”…. That and great playing and production, but you get the point. Get an Engl cab if you want that vibe.