Best Floggers?

When my wife and i first started our flr, the first tool i bought her was a flogger. It was her preferred method of both punishment and play for a while. But as we progressed, i bought her new toys: a riding crop, a hickory paddle, and a 4ft leather whip (her current favorite).

With all these new tools, my wife has pretty much phased out the flogger. She says that for her, the flogger is the most work, and it produces the fewest results. So she never uses it anymore.

I told her i would buy her a new one, but i am not sure what kind to get. I am looking for one that will produce the best results (her way of saying the most pain), with little effort on her part.

Can anyone recommend a flogger that might be good for us??