TM, if you don't have any Morton at all, you should definitely start with the JSP box:
This 5-CD box sells for around $25 or less, has received many rave reviews, and features excellent remastered sound by the late John R.T. Davies, one of the most respected 78-restoration engineers. While the JSP label and its owner, John Steadman, have more recently been embroiled in a lot of controversy (and litigation), this earlier legitimate issue is the real thing, and a credit to Davies' famous engineering skills. As I said, it's a terrific, and relatively inexpensive, place to start. Here's the page on Amazon with reviews and sound samples.