Singer's list - max size?

[songpony]

Is there a maximum number of songs that can/should be kept in an individual singer's list? I have about 800 in mine (yeah, it's a lot) and obviously experience a huge wait time every time I open my list to select a song. I've always used an Excel spreadsheet for my list (and still have to for the video songs, since there's no way to get them in the Singer's List), but was hoping to use this new feature as the primary lookup for the majority of my songs. Just wondering how big I can go and still have it "usable" (able to retrieve a song before the current singer finishes). Thanks.