Trackman,
Les Pauls are great for rythmn, as well as great lead. I love the sustain, and drive, throw a little overdrive in, and you've got that classic sound Les Pauls are famous for. If you're not too much into nameplates, just looking for a quality axe, check out the Agile line, or Tokai line of Les Paul copies. In that price range $300-$500 you get a very good quallity copy, that would be equilivant of a higher end Epiphone.
It's been reported that the Epiphone quality has really gone down hill the last few years, and these guitars will give you a better guitar for the price. I'm repeating what I've heard others say, so I'm not too sure of the validty, but my understanding is that when Epiphone production was moved to China that the factories in Korea and Japan that had made the Epi's started to sell their product under the Agile, SX Tokai, Jay Turser, Samick, and many other names. I've played a Samick LP copy and it was very nice. I own a Jay Turser 335 copy, and have a friend who's owns a Samick.
I've not played the Tokai but someone who's opinion I value says that the Tokai sounds, plays, and feels more like a Gibson than anything he's ever played. Has the same wieght and balance, tone and playability. He said it feels more like a Gibson Les Paul than his Epiphone Les Paul. A reputable distributer
http://www.jsdguitarshack.comYou can get Agile's from Rondo music. Rondo has a excellent reputation of customer service and if you get one that has a problem has been known to exchange the instrument quickly. There is a nice gold-top Al-300 with P-90 pickups there for $369.95. The 3000 is one of their top of the line examples. The biggest gripe I've heard on the Agiles is their weight.
http://www.rondomusic.net/index.htmlOrdering over the net for a guitar can be challenging, because it's always better to play before you buy, but if you look around you and are willing to take a few risks, you can find decent options in that price range.