Hi jalist..
No you wont get flamed for this particular observation. Just dont say you like any 80's Genesis, because thats a cardinal sin.
I dont know the Level 42 track you mention, but I'm aware that early in their career, they used to 'jam' a lot live, and do alot more imstrumental pieces. They were indeed excellent musicians. Their weakest link was probably Mark Kings voice (clearly not his bass playing!)
In terms of where else prog reared it's beautiful head in the pop world, well I like to think their were elements of it in the 80's synth pop scene. I thought that some of the symphonic elements of ABC, and the guitar and synth driven power of Ultravox, had probably been bourne out of some prog influences. The experimental approach of Japan and early OMD (with their messed up Mellotrons!) is arguably progressive in it's own way. Although clearly not prog 'rock' the music was pioneering and totally original at the time. More than you can say for a number of modern prog rock bands..