I don't know anything about a Classic 30 but
what I would recommend, is that you wait until you get the guitar and amp and see what they sound like first. You may already be close enough for your goals. If that doesn't cut it, I'd look into amp modelers like the Line6 PODs or Behringer V-Amp stuff. A lot of music stores will have those hooked up with headphones that you can try, or if not, ask if you can.
I don't buy into the whole Marshal stack thing for one main reason. Almost every major guitar player during that time period was playing an LP through a Marshal stack. Did they all sound the same? No. Similar, maybe, but no more similar than a modeler or pedal will get you.
A lot of this depends on how picky you are, and from the sound of it, I don't think you're as picky as some here might be.
I don't think the Lizzy sound ought to be that hard to come close to. Sounds
very solid state to me, others may disagree. I will say I don't think a Fuzz Face will do it, unless there's a tweak that I don't remember. A Rat probably will get you closer. I'ver got an old transistor amp that I think might do, but you can't have it.

It was my first one, and it was from a dime store, which would be the early 70's equivalent of a Wal-Mart. It's a piece of crap, but it was my first piece of crap, and I develop sentimental attachments to just about everything.
I've also got an old
Univox Super Fuzz, that might be close, but I'm sure you can't find them either. Sorry
Enough reminiscing.

Like I said, hear what you're getting sounds like first, then go from there. If I get time (and I probably won't until
at least after Christmas), I'll put the Boys back on and dig out my stuff and see how close I can get without going through an amp (which would skew the results). If I find something, I'll let you know and maybe shoot you a sample or two. You know I just realized I don't have a dual humbucker anymore! Guess I'll have to get one.

Lucky for you, if I do, It'll probably be an Agile also. I keep waiting for them to get a tobacco sunburst in the 3000 line (which Kurt said was in the works), but at some point I guess I'll have to stop waiting.
The funny thing is, I think that the chord dies off too quickly and doesn't have enough sustain.
