I currently have a small library of music, estimated at 5k songs. Most are from rips from CD's I've accumulated over the past 10+ years, and the sound quality is questionable. When streaming in my car via bluetooth, I find myself constantly changing volumes per song because of bad quality vs good quality. My question is, if I activated itunes match, deleted my entire library on my Macbook Pro, re-downloaded all the songs of higher quality, how do I get them to my iphone, if I deleted all the old music off my iphone, would I just sync normally, and all the new music would sync? Or do I have to turn itunes match off on my phone and then sync.... I heard its a little bit of a pain to replace music, I have backups, so I am ready to match my music, but I want my music on my phone so I don't have to download from the cloud anytime I listen.