Hi Justin. I just replied to your PM.
If it's actually broadening your mind/musical taste you're after here, then check in with Goofle, Engine, bob, Janszoon ... hell, most of us. Other than me. I'm pretty mainstream, with my love of mostly Prog and AOR and some metal. But also check the "Recommendations" threads and the various "Education" threads. They'll help you. But everyone is (mostly) friendly here and you can ask what you want, just try not to ask a question that has already been answered a hundred times!
As for prog rock, man that's hard. I assume you have never heard ANY prog other than what you mention? If that's the case you could start with the classics --- Genesis, Yes, Camel, ELP, Rush to a degree (earlier 70s stuff mostly), some Supertramp, Pink Floyd, King Crimson --- or more contemporary but no less classic bands like Marillion, Arena, Mostly Autumn, Kamelot, and a whole ton more. Depends on what you're looking for really.
Check out my journal too for ideas.