I have tried both and right now the popular choice is to use a Logo page that has genres... Sports Movies Music HD Local etc. They choose the type of channel they are looking for first then they are taken to a page with a collection of logos that are of that genere.

I started doing this with Prontos years ago and am still using the same Logos. I felt the ones provided in TTD were just too small. But if you do a scrolling list that makes them wide enough to hit.