It's your money, and you can certainly spend it on whatever you wish.
The contention of a large percentage of the respondents on this string is that if the power is conditioned prior to going to the amplifier or other main transformer circuit, as long as there is an ample flow of electrons, no power cord is going to effect the sound. Therefore, you are better spending the extra money on better source/preamp/amplification than a "Magic" power cord.
This is one subject that gets a lot of people on here worked up, because exotic power cords more than anything else are percieved to have a placebo effect. In other words, the science says it's a bunch of BS. There is no signal being transmitted over a power cord so how could it effect the sound? As long as there is continuous and sufficient flow of electrons to the gear, there should be no effect. The power supply of the gear is what can effect the sound.
That said, I think most on here would not dispute that you can get improvement in sound with an aftermarket power cord that has better contact, a large wire, and shielding, but that after the first level of upgrade (Signal Cable for sake of arguement) there is no appreciable improvment.