I was told to buy one of these http://eshop.macsales.com/item/Newer%20Technology/MXPCIE6GS2/ because it is supposedly better than USB2/FW for external DVD burning. 1) Is that true? 2) What else could I use the eSATA port for? 3) Is there a better PCIe card I should consider for other purposes down the road? Thanks.