I'm my iPhone, I want to fit more music and not too concerned with sound quality since I only use it at the office, jogging, with the stock earbuds. If I select the 128kbps option, does it change anything on my computer? I'll my songs are ripped in high quality and I don't want them affected. Also, when I delete (I change out songs alot), does iTunes auto-delete those files? I don't want a bunch of 128 bit files dumped back into my computer.