forget the Pulse, buy the Tama.

also, i agree that you should focus first on learning the basics of using a single kick pedal before moving to a double kick. Shit, i remember learning how to do double kicks on one foot was a big challenge for me starting out, but it was a skill that is so fundamental and neccessary. If I had a double kick pedal, i would have just taught myself to cheat by using both feet.