1 speed to 2 speed what motor to get?

Hi,

Wanting to reduce energy costs, so I am looking to replace my AO Smith B2843 (2 HP, Y56 flange type CX) with a 2 speed pump. AO Smith says to buy their B2984, but they are ~$400. Is there another brand equivalent that I should be looking at? I realize that it will probably pay for itself in a year, but I am wondering of there are others to consider.

Thanks!