I bought my first mac (24" aluminum iMac) a few months back. I love the computer except for one thing... the superdrive. The 8x burn speed just isn't doing it for me. Does anyone have any experience with using an external burner? The one I'm looking at right now is here: http://www.newegg.com/Product/Product.aspx?Item=N82E16827248007 The 20x burn speed looks impressive, but can the USB2 connection keep up with that kind of burn speed? Thanks.