pip value in $ vs margin cost...

Hey everyone,

I was just wondering what everyone's take on the varying pip values vs margin cost, for example if i trade a volume of .8 with the AUD/USD it costs me (with leverage of 500:1) $175.47 in margin and 1 pip is worth $8,

if i were to be following say, USD/CHF the same volume .8 costs me (500:1) $160 in margin and 1 pip is worth $9.25.

that extra $1.25 would reduce the number of pips needed to hit financial targets? and if the work is the same to analyze either chart why not go with the one that costs less to open and gives more profit?

answers on a postcar... nm!

thanks