Sharpee looks like crap, I don't care how nice your writing is. For text only Lightscribe is very nice, very professional looking finished disc's. Graphics can look absolutly stunning if you do it right. I have a LS burner and a ip4000. I print tons of cd's on the Canon, but LS is great too. If it was about 2x as fast I'd probably use it a lot more
To OP, if time isn't an issue, I suggest you go to the Lightscribe web site, they have a download section and have a contrast utility that will darken the labels even more. Took me about 30 minutes to do a full graphic label with the 1.2 media, but the finished disc was bad ass.
software wise, I suggest Surething 4 SE, which is a free download on Lightscribe's site. Also their site has a nice section of jpg labels you can download, I did the dragon one and it came out sweet