If you want a full featured Gibson Les Paul with a little bit thicker body which can give it a little bit beefier tone, go with the Les Paul Classic. If you want an even beefier tone, you can go with the Les Paul Custom that comes with the 490R/498T pickup combination and the Customs start to have this growl to there tone that only a Custom seems to get, because of the heavier/thicker body I am thinking.
I began to notice "weight tone" when I moved from lighter superstrats, like Charvel DKs, to heavier guitars, like ESP LTDs, about a year ago. I've gone from loathing weight to loving it. The growl is exactly what I love about 498s - I didn't know that Customs came with them. An LP Custom Honeyburst with 490/498 is pretty close to my ideal guitar.