stock stereo system isnt bad, i like it. loud enough for most of my music.. but i do miss the full aftermarket system i had in my old car with every speaker amplified. an AUX 3.5mm jack would be awesome stock, they do sell the aftermarket module for it. but do they really have to charge around 100 dollars?
tires, i have the Bridgestone EL41's and they seem to be great so far too. I do drive aggressively sometimes, and there is an S curve going up to my work in an industrial park, they make my tires squeel a little going around 30ish. i mean they arnt performace tires. so i dont really expect more than what they put out.