We started with a thin wakesurf rope with handle and without knots. The rope really hurt your hands when trying to pull yourself in closer to the sweet spot, plus because it was thin, people had a tendency to wrap the rope slack around their hand (a definite NO-NO).
After a season, we switched over to a thick rope with handle and knots. It was much easier to hold on to the rope while pulling yourself in, especially for beginners. I've always been more comfortable with the handle vs. t-bar or end knot.
Sorry, don't know where the best prices are to be found.