Yes I think the aftermarket stuff I've seen in our trucks looks like crap, so a cheap stock upgrade is all I'm looking for.
Really the standard stock radios in these trucks aren't as bad (concerning sound quality) as people make them out to be. I wish I still had the link but I remember reading some tests years ago and the stock Delco radios put out considerably more power than the 12-15W RMS per channel that most aftermarket head units offer these days. I want to say it was around 20W. A good set of speakers all around on a factory head unit can actually sound pretty decent. You might want to drop some in if you haven't already and see where that gets you.