Paste
I don't know if the RS is past its prime, it certainly is very different from what it was. the same rebels who started it grew into complacent old farts up to the early 90's. I dropped my subscription when they went crazy with the hair metal bands. Basically every interview read like, "y'know, I'm this fuckin' room and we're fuckin' trashin' it and fuck if a fuckin' groupie isn't the bathroom givin' a fuckin' roadie a fuckin' blow job."
I picked it up again in the late '90s. It was better, but magazines like Paste are much better at finding bands about to break. The writing is much better, none of that snarky crap.