Speed strobe recommendation.

I'm sure there are others out there, the three I'll mention are Clearaudio ($160.00), KAB ($100.00), Merrill,($30.00). As far as accuracy and ease of use go, is there any reason to spend the extra $ on the two higher priced strobes mentioned? After all Merrill has been at this a long time, I would think he would put out a quality product. Any help will be appreciated.