I quite like Poison, but have to admit that the classic lineup albums are pretty much bubblegum pop-rock. Lot's of flavour and flash, but no real substance. CC's ok in the studio but I wish he would control himself live and stop fret-wanking. Widdle widdle widdle with no sense of melody. His epic solo on Swallow This Live has gone down in history as probably the worst guitar solo of all time.
As popular as the classic lineup is, I much prefer Native Tongue with Richie Kotzen instead of CC. He is literally all over that album. He made them sound like a talented, mature rock band, so much depth, feeling and substance. Seriously, if you're not a Poison fan, check this album out.
Also a huge Def Lep fan boy, have been since Hysteria (although I prefer the earlier stuff, particularly High n Dry. I'm quite pleased to see they are starting to put earlier work in their sets these days, I think they have realised their audiences aren't mainly kids any more but lifelong fans who want the classics. Sure Joe'd voice isn't what it was, but he works hard and lets be honest, starting to get on a bit.
BTW, who care's if it doesn't sound like the album? Who cares if they can't recreate the densely multi-layered harmonies completely live? Studio and live are completely different animals. Queen never did either, but that never stopped them becoming one of the best live acts in the world. If you want to watch a band that sounds like the album, watch videos on MTV.