well, I've never used half-rounds but I like the d'addario flats, really mellow, groovy bass tones there, put 'em on a jazz and start laying down some R+b, blues, funk, country and rock really, sound great picked too, the squeak reduction is true, but at the same time, you lose a lot of treble, twang and harmonics are a little harder to get too, but they'll definitely get the tone you want.
"the emperor is rich, but he cannot buy another year"
-anonymous chinese person
"the thief is sorry for being hung, not for being a thief"
-anonymous
"We are not nationalities, we are not races, we are not political parties, we are not social classes, we are not cultures, we are not subcultures, and we are not churches, but when all things are said and done, the guns are shot, the riots have died down, one thing is true, and that should preceed all other things, we are, without division: HUMAN BEINGS, is that not good enough an excuse stop shooting people, and letting others starve to death?" -Pie_man_25