Bon was great, and overall the consistency of AC/DC's music was better when he was alive, where it's been a bit more hit and miss with Brian. As an album, I'd take a Bon album over a Brian album(except maybe if the album was Back in Black or Fly on the Wall), but they've still had some great individual songs. Stiff Upper Lip was disappointing, but Ballbreaker had a few outstanding rock tunes (Hard as a Rock, Ballbreaker, Caught with your Pants Down, Hail Ceaser), as did Razor's Edge. They are the mighty oak that has not been swayed by trends, and I agree with mattbish that they are 2nd only Anthrax.
As for Aerosmith, they've missed more than they've hit in the past decade...for me, although Pump was an overall great album, Janie's got a Gun was the worst track on it, which spelled doom when it became such a big hit, because it encouraged the band to put out more of that drivel...